Chart board to select observation objects aboard orbital spacecraft

FIELD: space engineering.

SUBSTANCE: chart board designed for selecting observation objects aboard the orbital spacecraft comprises a semi-transparent plate depicting a curvilinear spacecraft trajectory, a flexible tape arranged behind the said plate with two copies of the Earth surface maps wherein the end points of equator of the first map are aligned with the start points of equator of the second map, and a device designed to move the tape with maps along the plate made up of two shafts spaced apart and linked up in parallel, the enclosed tape being arranged so as to move along equators of both maps. Note that, in compliance with this invention, the proposed chart board comprises additionally a flexible semi-transparent tape with two celestial maps, including ecliptic line, wherein the end points of equator of the first map are aligned with the start points of equator of the second map, and a device designed to move the tape with celestial maps along the plate made up of at least two spaced apart and linked up in parallel shafts whereon a new tape is located so as to move along the equators, second semi-transparent tape depicting curvilinear lines everyone being made in the scale of the celestial maps axes and being formed by the points spaced apart by an equal angular distance equal to half an opening of a planet disk visible from the spacecraft, and a device designed to move second plate relative to the first one along the axes perpendicular to the maps equators. Note that the scales of celestial maps and the width of the tapes with celestial maps are identical to the scales of the Earth surface maps and the tapes with the Earth surface maps and that both maps scales equatorial axes are represented at the ration of 1:K where K is the factor of compliance of the scales of equatorial scales defined from the formula K=1-tω/(2π+Δ Ω), where T is the spacecraft period, ω is the Earth angular speed of revolution in inertial space, Δ Ω is the helical orbit precession in the inertial coordinate system. Note here that the width of the second plate complies with that of the first plate, the former being determined from the formula L = arccos([cosQ-sin ε sin i]/[cos ε cos i])Ls/2π, where Ls is the length of equatorial scale of one celestial map, Q is the angle of half-opening of planet disk visible aboard the spacecraft, ε, i are the angles of inclination of the planes of ecliptic and spacecraft orbit to the equator plane, respectively.

EFFECT: expanded performances of chart board.

8 dwg

 

The invention relates to the field of space technology and can be used to identify and select objects on Board an orbiting SPACECRAFT), moving in a near-circular orbit.

Known maps of the earth's surface: [1], communalisation map of the mission control Center (MCC), and maps of the sky [2], which can be used to identify and select geophysical and astronomical objects for observations performed with the AC. The lack of maps is that they do not have graphical information about the orbit of the SPACECRAFT.

The closest analogues adopted for the prototype, is a tablet for the identification and selection of objects geophysical observations aboard orbital space stations [3], which contains two copies of a map of the earth surface caused on the basis of (a flexible tape, a translucent plate with the image of a curve of the track loop orbit, installed above the ribbon with the card, and the device providing movement of the tape with the card along the plate with the image of the orbit.

The shape of the curve lines round the orbit of the SPACECRAFT is determined by the inclination and height of the orbit and associated circulation period of the SPACECRAFT around the Earth. While the device providing movement of the tape with the card along the plate with the image of the orbit is made of the Vuh posted and bonded in parallel between the shafts, with maps printed on the tape with the combined end point of the equator the first instance of the map with the starting point of the equator of the second copy of the card and tape the card is made of a closed and tight on the shaft with a circular movement along the line of the equator cards.

Tablet [3] is presented in figure 1. This tablet is used in RSC Energia and the Russian MCC for planning geophysical observations from orbiting SPACECRAFT.

Working with the tablet as follows.

With the help of the device providing movement of the tape with the card along the plate with the image of the orbit connecting point of the equator of the map corresponding to the longitude of the ascending node of the considered orbits the orbit, with the point of ascending node of orbit round, depicted on the plate. This is depicted on the translucent plate curve line of the track loop orbit shows on a map the location of the tracks of this loop that allows you to define and select a point of the surface for observation at this stage orbit.

Tablet, taken as the prototype, has a major drawback - it is not possible to identify and select objects on the earth's surface simultaneously take into account the conditions and restrictions associated with objects on the celestial sphere (the starry sky) - the Sun, Moon, planets, astronomicas the mi objects of observation. One of the main conditions of visual observations of the planet's surface is the condition for being KA on the sunlit part of the orbit.

The task of the proposed device is an expansion of the functionality of the device by providing a selection of objects with the AC when imposing conditions of location of the SPACECRAFT on the sunlit part of the orbit.

The technical result is achieved by the fact that in the tablet to select objects observations from orbiting spacecraft, including a translucent plate with the image of a curve round the orbit of the spacecraft below the plate, a flexible tape coated with two copies of the map of the planet's surface with the combined end point of the equator the first instance of the map with the starting point of the equator of the second copy of the card and the device providing movement of the tape with the cards along the plates of the two spaced apart and fastened together in parallel between a shaft on which the tape is made closed, is placed with its circular movement along the line of equatoral cards, characterized in that it further introduced flexible translucent tape with the image of two copies of maps of the starry sky, including the line of the Ecliptic, with the combined end point of the equator the first is qsampler cards with the starting point of the equator second copy of the map, the device providing movement of the tape with the image of the map features a starry sky along the plates of at least two spaced apart and fastened together in parallel between a shaft on which the newly introduced tape placed, with the possibility of moving along the line of equatoral cards, the second translucent plate with the image of curves, each of which is made in the scaling of the axes maps of the sky and formed by the points the remote at the same angular distance equal to the angle of polarstar visible from the spacecraft disk of the planet, from the point of latitude range of the line of the Ecliptic, and the device providing movement of the second plate along the first plate, the axes perpendicular to equatoral maps, scale maps of the sky and the width of the tape with the sky maps of the same in accordance with the scale of the map the earth's surface and width of the tape with maps of the earth's surface, and Equatorial axes scale maps of the sky and the earth surface is made in the ratio of 1:K, where K - coefficient of compliance scale Equatorial scales, defined by the formula:

K=1-Tω(2π+Δ Ω),

where T is the orbital period of the spacecraft around the Earth,

ω - the angular velocity of the rotation of the Earth in inertial space,

Δ Ω - the winding precession orbital inertial coordinate system, the width of the second plate coincides with the width of the first plate and the second plate L is determined by the formula:

L=arcos([cosQ-sinεsini]/[cosεcosi]Ls/2π,

where Ls- the length of the Equatorial dial one copy of the map of the starry sky;

Q - angle polarstar visible from the spacecraft disk of the planet;

ε, i - the angles of inclination of the planes respectively of the Ecliptic and the orbit of the spacecraft to the plane of the equator.

The tablet is illustrated in figure 1-5. Given: figure 1 - tablet-prototype; figure 2 is a variant of the design of the proposed tablet; figure 3 - example of graphical representation of lines shown on the second wafer; figure 4 - diagram of the shading KA planet; figure 5 is a diagram illustrating the structure presents a variant of the tablet.

Figure 2 led indicate:

1 - flexible tape with maps of the earth's surface;

2 - shaft devices provide moving tape (1);

3 - axis shaft (2);

4 - structural elements, fastening the axis of the shafts (2);

5 - flexible translucent tape with the image of the map features a starry sky;

6 - shafts device providing movement of the tape (5);

7 - axis shaft (6);

8 - elements of construction, fastening the axis of the shafts (2) and (6);

9 is a semi - transparent plate with the image of a curve round the orbit of the SPACECRAFT;

10 - the other is a translucent plate;

11 is a curve round the orbit of the SPACECRAFT;

12, 13 - line equatoral cards, respectively, of the earth and of starry heaven;

14 - projection line equatoral cards on the plate (9);

15 - point ascending node of the orbit to the line (11);

16 - guiding elements of the device providing movement of the second plate (10) along the first plate (9);

17 a - line shown on the second plate (10);

18 - the line of zero longitude lines (17).

In the present embodiment, the design of the proposed tablet device providing movement of the second plate along the first plate has a guiding elements (16), providing a moving plate (10) along the plate (9). In the present embodiment, the tablet guiding elements (16) are also elements of design, the locking position of the plate (9) with respect to structural elements(4), (8).

Presents a device providing movement of the tape (5) along the plate (9) is made of two spaced apart and fastened together in parallel between a shaft (6) and elements of design(4), (8), (16), that bond the axis of the shafts (6) and fix the position of the plate (9) on shaft (6)on which is placed the tape (5).

Explain the choice of the scaling factor Equatorial axes of cards. During the revolution plane of the orbit of the SPACECRAFT will rotate relative to the celestial sphere is and the angle Δ Ω, which is the winding precession of the orbit in the inertial coordinate system defined for the case of SPACECRAFT around the Earth by the formula ([4], str):

where Re- Equatorial radius of the Earth;

R - focal parameter of the orbit;

i is the inclination angle of the orbit;

I2=-1082,2 10-6- the ratio of the potential of the gravitational field of the Earth.

When the orbital inclinations of less than 90° (which corresponds to all research orbiting SPACECRAFT), the value of Δ Ω negative (orbit precessive in the direction opposite to the rotation of the Earth). For example, for the orbits orbital space stations (Salyut, Mir, international space station (ISS)) Δ Ω constitute -0,3°.

Relative to the Earth during orbits the orbit plane rotates through the angle Δλ, which is the inter-track distance associated with the Earth coordinate system defined by the formula:

where T is the average period of treatment SPACECRAFT around the Earth,

ω - the angular velocity of the rotation of the Earth in inertial space.

To the same image orbit was applicable to both cards, it is necessary that the magnitude of their Equatorial axis - axis climbs maps of the sky and the axis longitude maps of the earth's surface were performed in which reportii

or

where K - coefficient of compliance scale Equatorial scales, defined by the formula:

Scaling by the formulas (3)-(5) provides synchronization of the images of the sub-satellite point on the Earth with the Zenith point of the AC on the celestial sphere.

Explain the choice of the proposed dimensions of the second plate.

In figure 4, illustrating the scheme shading KA planet indicated:

About the center of the planet;

The p - surface of the planet;

It is the position of the SPACECRAFT at the time of input or output SC from the shadow of the planet;

G - point visible from the AC horizon of the planet;

R is the unit vector in the direction of the radius vector of the SPACECRAFT;

S is the unit direction vector to the Sun;

Sois the unit vector sun;

Q - angle polarstar visible with the AC drive of the planet.

The SPACECRAFT is on the shadow side of the orbit, when the angle between R and Sosmaller values of the angle Q, and at points of entrance and exit KA from the shadow of the planet condition:

where (R, So) is the scalar product of unit vectors R and So.

The angle Q is calculated by the formula:

where Ro=OK is the radius of the orbit;

Rp=OG - the radius of the planet.

We will build on the map of zvezdov the sky line {T}, formed by the points distant from the point Soon the angular distance Q:

Then the intersection of the line {T} and the line {R}, formed by the radius vectors of the SPACECRAFT orbits the orbit, will indicate the entry of CA in the shadow of the planet and the output SC from the shadow of the planet.

The latitude range of the line of the Ecliptic is [-ε, ε]where ε - the inclination angle of the plane of the Ecliptic to the equator (ε=23,4°). Construct the set of lines {T} (line (17) in figure 2), each of which is defined by the formula (8), for different values of the latitude of point Sothe range [-ε, ε] (for example, with a uniform step). Figure 3 presents an example of the graphical image data curves constructed for the latitude of points Soin the range [-23°, 23°] step 2° for ISS orbit height ≈370 km (Q=71°).

Because the shape of the lines {T} depends only on the latitude of the point Sothe longitude of points Sofor which constructed the data line, estimated to be equal to 0, i.e. all points of Solie on the line of zero longitude line (18) in figure 2).

Note that the line {R} (line (11) in figure 2) spiral orbit covers the area maps of the sky in the range of latitude [-i, i] (we assume that i is positive). Therefore, the line segments {T}located outside the interval of latitudes [-i, i], excess to the problem of determining the intersection of {T} is the line {R}. Given that the excessive size of the second translucent plate, which is applied to the line {T}, can create inconvenience for reading information from the card, beneath this plate, this plate it is advisable to perform shortest - containing only the line segments {T}inside an interval of latitudes [-i, i] (this region in figure 3 is limited by the dashed line).

This second plate is defined as follows.

Let us denote:

T1the point of the line {T}, with the latitude i;

S1- extreme point on the Ecliptic, with the latitude ε.

The maximum size L line {T} in the interval of latitudes [-i, i], measured parallel to the line of the equator, is implemented at the latitude of the point T1and when the position of the point Soat point S1.

By the formula for the angle between two unit vectors T1and S1have:

where Δα - the difference of longitude between points T1and S1.

Taking into account (8) we have

For example, for ISS orbit height ≈370 km (i=51,6°; Q=71°) get Δα=88,6° (see figure 3).

Using the value Δα, L is determined by the formula:

where Ls- length of Equatoria Inoi scale one copy of the map of the starry sky.

Thus, the minimum possible length of the second plate L is determined by the formula (13).

Figure 5, illustrating the design presents a variant of the tablet, additionally indicated:

L0- the length of the plate (9), equal to the length of the projection line (11) on the equator card;

L1- the distance between the axes of the shafts (2);

L2- the distance between the axes of the shafts (6);

L is the length of the second plate (10);

R1- the radii of the shaft (2);

R2- the radii of the shaft (6).

Working with the tablet as follows.

The rotating shaft (2) devices provide moving tape (1), combine the point of the equator (12) maps of the earth's surface corresponding to the longitude of the ascending node of the considered orbits an orbit point (15) - point ascending node is depicted on the plate (9) spiral orbit. Further, the rotating shaft (6) device providing movement of the tape (5), combine the point of the equator (13) maps of the sky corresponding to the value of the right ascension of the ascending node of the considered loop orbit in the inertial coordinate system, point (15). After this line orbits orbits (11) will show on the maps of the earth's surface, causing the tape (1), the location of the track in question orbits orbit, and on the ribbon (5), which is applied to the image of the map features a starry sky - location of the track radio the vector of the SPACECRAFT in the sky during the revolution.

Fixed point of the Ecliptic Sothe opposite point to the current position of the Sun S, define and record the latitude of the point So.

Move the second plate (10) with respect to the first plate (9) and, therefore, the line of the Ecliptic, caused by the tape (5), before reaching point Sothe line of zero longitude (18). Identify the line (17), the corresponding fixed to the latitude of the point So. The intersection of this identified line (17) from line (11) indicates the point of entry and exit KA from the shadow of the planet. The line segment (11)located between the data points, is the shadow area round the orbit. The rest of the line (11) is illuminated by the Sun area round the orbit. When the identified line (17) does not intersect with the line (11), KA is on "solar orbit" - for an observer on the SPACECRAFT, the Sun stays above the horizon of the planet during the entire round.

Thus, the graphical representation allows to define a point of the surface and the point of the celestial sphere, observable with KA for the shadow and illuminated parts of the considered orbits the orbit.

Describe the technical effect of the invention.

The proposed device extends the functionality of the prototype by providing a selection of objects with which And subject to the conditions, associated simultaneously with the objects of the earth and the celestial sphere, including the conditions of location of the SPACECRAFT on the sunlit part of the orbit. For this purpose, the proposed device, the technical problem is solved simultaneous display of passing the AC on objects of observation and determine the moments of illumination orbit the Sun (identify beginning and end of the lighted area round orbit).

The technical result is achieved due to the introduction of device-prototype flexible translucent tape with the image of the map features the starry sky, the devices provide moving newly introduced tape, the second translucent plate depicting the proposed curves and devices ensure movement of the second plate along the first plate, and also due to the proposed installation of the newly introduced items and the proposed size of the newly introduced elements.

LITERATURE

1. Votyakov A.A. Theoretical geography - 3. Map of a flat earth. - M: Sofia, 2002.

2. Map of the starry sky with the zodiac constellations. - M: DI EM BI, 2004.

3. Map tablet 17K-7988. RSC "Energia".

4. Engineering Handbook of space technology. M., Publishing house of the USSR, 1969.

The tablet to select objects observations from orbiting spacecraft, including semi-transparent p is astina with the image of a curve round the orbit of the spacecraft, below the plate is a flexible tape coated with two copies of the map of the planet's surface with the combined end point of the equator the first instance of the map with the starting point of the equator of the second copy of the card and the device providing movement of the tape with the cards along the plates of the two spaced apart and fastened together in parallel between a shaft on which the tape is made closed, is placed with its circular movement along the line of equatoral cards, characterized in that it further introduced a flexible translucent tape with the image of two copies of maps of the starry sky, including the line of the Ecliptic, with the combined end point of the equator the first instance of the map with the starting point of the equator the second copy of the card, the device providing movement of the tape with the image of the map features a starry sky along the plates of at least two spaced apart and fastened together in parallel between a shaft on which the newly introduced tape placed, with the possibility of moving along the line of equatoral cards, the second translucent plate with the image of curves, each of which is made in the scaling of the axes maps of the sky and formed by the points the remote at the same angular distance equal to the angle of polarstar visible from the spacecraft disk of the planet, from which the eyeglasses from a range of latitudes in the line of the Ecliptic, and the device providing movement of the second plate along the first plate, with the axis perpendicular to equatoral maps, scale maps of the sky and the width of the tape with the sky maps of the same, respectively, with the scale of the map the earth's surface and width of the tape with maps of the earth's surface, and Equatorial axes scale maps of the sky and the earth surface is made in the ratio of 1:K, where K - coefficient of compliance scale Equatorial scales, determined by the formula

K=1-Tω/(2π+Δ Ω),

where T is the orbital period of the spacecraft around the Earth;

ω - the angular velocity of the rotation of the Earth in inertial space;

Δ Ω - the winding precession of the orbit in the inertial coordinate system,

the width of the second plate coincides with the width of the first plate and the second plate L is determined by the formula

L=arccos([cosQ-sin ε sin i]/[cos ε cos i])Ls/2π,

where Ls- the length of the Equatorial dial one copy of the map of the starry sky;

Q - angle polarstar visible from the spacecraft disk of the planet;

ε, i - the angles of inclination of the planes, respectively, of the Ecliptic and the orbit of the spacecraft to the plane of the equator.



 

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3 dwg

FIELD: physics.

SUBSTANCE: accelerometer assembly and angular velocity sensor unit are mounted on platform in biaxial Cardan suspension. Platform is stabilised around Cardan suspension axes using signals generated by angular velocity sensor, and torque meters mounted on Cardan suspension axes. Apparent accelerations of platform are measured using signals generated by accelerometers. Absolute angular velocity of platform is measured using signals formed by angular velocity sensor. Angular position of object body is measured concerning platform using signals generated angle-data transmitter mounted on suspension axes of platform. Received signals are computer processed and navigation parameters of object is calculated in reference coordinate system.

EFFECT: higher accuracy of evaluation of object navigation parameters using hybrid inertial navigation system.

2 cl, 3 dwg

FIELD: physics; cosmonautics.

SUBSTANCE: choice plotter of objects under observation from orbital spacecraft (SC) includes translucent plate with image of SC orbit pass curve, flexible belt located under the plate and containing two applied copies of planet surface map with aligned equator end point of the first copy of map and equator start point of the second copy of map, and map belt shift device along the plate from two spaced and parallel interconnected shafts on which closed belt radially moving along the map equator lines is mounted. In addition there are introduced flexible translucent belt with object image of two copies of stellar map, including ecliptic line with aligned equator end point of the first copy of map with equator start point of the second copy of map, and stellar map object image belt shift device along the plate from at least two spaced and parallel interconnected shafts on which newly introduced belt moving along map equator line. Along the axes perpendicular to map equators, stellar map scale and belt width with stellar maps coincides respectively with terrestrial map scale and belt width with terrestrial map. Along equatorial axes, stellar and terrestrial surface map scales are executed in ratio 1:K. Stellar map object image belt shift device is executed in the form of two spaced and parallel interconnected shafts. The radius of shafts of stellar map object image belt shift device is more or equal to radius of shafts of terrestrial surface map belt shift device. Distance between shaft axes of stellar map object image belt shift device exceeds total distance between shaft axes of terrestrial surface map belt shift device and radiuses of all four shafts of both belt shift devices Width of plate with orbit line image and width of belts are provided in relation equal or more than relation of orbit dip angle to 90°.

EFFECT: provided simultaneous display of spacecraft passage over land objects and coelosphere objects.

2 cl, 3 dwg

FIELD: physics; cosmonautics.

SUBSTANCE: choice device of astronomical objects under observation from orbital spacecraft (SC) includes stellar globe, ring embracing the globe with aligned ring and globe centres and fixed over globe poles and rotating round globe rotation axis, the second ring embracing the globe with aligned second ring and globe centres and fixed on the first ring in crosspoints of the first ring and globe equator plane and rotating to position of the angle between second ring and globe equator plane equal to the angle of SC orbit dip angle. Additionally there are two elements with contour projection to globe surface forming circles and globe centre direction forming straight line passing through globe centre and perpendicular to the second ring plane, the angle equal 90° minus one-half angle of planet disk visible from SC round which SC moving in semi-circular orbit turns. Elements are fixed over globe surface from its opposite sides with one or more arches connecting introduced elements with the second ring. In addition each newly introduced element is designed in the form of translucent spherical segment one-half angle of which angle is equal 90° minus one-half angle of planet disk visible from SC, with slot provided from spherical segment edge to its centre arch length of which is equal or more then one-half angle of spherical segment minus SC orbit dip angle. Spherical segments centres lay on straight line passing through globe centre and perpendicular to the second ring plane with aligned centre of sphere forming spherical segments and globe centre. Slots in spherical segments are opposite to different globe poles. In addition each newly introduced element is constructed as ring placed on ruptured element contour. Ring segments opposite different globe are removed within ring rupture points.

EFFECT: provided display on stellar globe of regions observable from spacecraft during the whole orbit pass.

3 cl, 5 dwg.

FIELD: physics; space.

SUBSTANCE: device relates to space technology. The device consists of a globe with a map on it, two rings bracing the globe, the centres of which coincide with the centre of the globe, an element in the form of spiral coil, corresponding to the average turns of orbits of the space vehicle moving in an almost circular orbit, starting from the ascending node of the turns of the orbit, given in the right Cartesian coordinate system OXYZ, the centre of which coincides with the centre of the globe and the OZ axis is directed on the axis of rotation of the globe, with coordinates calculated from the formulae: x = r(cos (Δλu / (2π) ) cos u - sin (Δλu / (2π)} sin u cos i), y = r(sin (Δλu / (2π)) cos u + cos (Δλu / (2π)) sin u cos i), z = r sin u sin i, where i is the inclination of the orbit; r is the radius of the second ring; Δλu is the angular inter-turn distance of the orbit on the equatorial scale of the map; u is a parameter assuming values from 0 to 2π. The first ring is fixed over the terminal points of the globe with provision for rotation of the ring around the axis of rotation of the globe. The second ring is installed in the plane of the equator of the globe and is fixed on the first ring at the point of intersection of the first ring with the plane of the equator of the globe. The element in the form of a spiral coil is fixed to the second ring at the point of intersection of the second and first rings, by its middle point, corresponding to the value of the parameter u, which equals π. The technical outcome is the determination and selection of observation objects.

EFFECT: possibility of determination and selection of observation objects from an orbiting space vehicle.

3 dwg

FIELD: physics; space.

SUBSTANCE: invention pertains to devices for space navigation and is directed at providing for the possibility of selecting under conditions of a space vehicle, observation objects with simultaneous consideration of the stipulated conditions, related to objects on the earth's surface and in the celestial sphere. This result is provided for due to that, the plane table for selection of the observation object from an orbiting space vehicle consists of a plate with a map of the earth's surface, a semitransparent plate with an image of the curved line of the orbit pass of the space vehicle from its ascending node, installed over the map of the earth's surface with provision for displacement along the equator of the earth, a semi transparent plate with an image of the objects on the stellar map, installed over the map of the earth's surface with provision for movement along the earth's equator line, and a device providing for mutual displacement of plates along the equator line. On the axes, perpendicular to the equator, the scale of the stellar map and the corresponding size of the plates with the given map coincide with the scale of the map of the earth's surface and the corresponding size of the plate with the map of the earth's surface, and on the equatorial axes, the scale of the stellar map and the map of the earth's surface have a ratio of 1:K, where K is the coefficient of concordance for the scales of the equatorial scales, defined from the formula K=1-Tω/(2π+Δ Ω), where T is the orbiting period of the space vehicle around the earth, ω is the angular velocity of rotation of the earth in the inertial space, Δ Ω is the turning precession orbit in the inertial coordinate system. The maps are made with the longitudinal dial of the earth's surface in the range from 0 to 4π+Δ Ω-Tω and the straight ascendancy scale of the stellar map in the range from 0 to 4π+Δ Ω, and the size of the plates with orbit and with maps of the earth's surface and the celestial sphere along the equatorial axes are in the ratio (2π+Δ Ω-Tω):(4π+Δ Ω-Tω):(4π+Δ Ω-Tω-2πTω/(2π+Δ Ω)).

EFFECT: possibility of selection of observation objects under conditions of a space vehicle.

2 dwg

FIELD: physics, space technology.

SUBSTANCE: plot board for ground surveillance object selection from orbital space vehicle refers to space technology. The plot board for ground surveillance object selection from orbital space vehicle includes flexible tape with the ground map printed on it, and semitransparent plate above the tape. Two halves of the space vehicle's orbit pass are drawn on the plate in such a way that the ascending node in the beginning of the first half of the orbit pass and the descending node in the beginning of the second half of the orbit pass are superimposed. The plot board also comprises a device for the tape map transport along the plate with orbit pass image; the transport device comprising two shafts that are spaced-apart and interconnected in parallel. The map printed on the tape has the equator beginning and ending points superimposed, and the tape is made in the form of a ring and pulled on the shafts so as to move along the map equator line. The distance between the shaft axes and size of the plate with the orbit pass image along the equator direction are equal to (L-d)/2, where L - is the map equator length; d - is absolute distance between passes measures in linear units along the map equator; shaft radius equals to d/(2π). The stated above gives the effect of decreased plot board size.

EFFECT: decreased size of plot board for ground surveillance object selection from orbital space vehicle.

2 dwgg

FIELD: invention refers to the field of astronomical and astrophysical explorations.

SUBSTANCE: coherent transponder of phase synchronization has a radio receiving set, a radio transmitting set, an airborne standard of frequency (H-maser) and also a logic and commutation block. The radio transmitting so as the radio receiving set consists of two half-sets. The radio receiving set has a radio receiver module of the amplifier of a very high frequency, a preliminary amplifier of intermediate frequencies, a block of phase automatic adjustment of the frequency, the amplifier of the reference signal 2▾ and the secondary source of feeding.▾- nominal frequency. The coherent transponder of the phase synchronization provides transformation of the input signal in diapason 961▾ into an answer signal in the diapason 1120▾ used for synchronization of the airborne thermostating controlled generator. For reducing the drift of the phase of the answer signal the system of transformations of frequencies is built on the principle of complete matching of tracts of multiplying of the radio transmitting set and the heterodynes of the radio receiving set.

EFFECT: phase synchronization of the airborne scientific cosmic apparatus on a weak signal on the whole extension of the high-apogeal orbit of the flight.

1 dwg

FIELD: onboard system for controlling spacecrafts for autonomous estimation of orbit and orientation of spacecraft body.

SUBSTANCE: method for autonomous navigation and orientation of spacecrafts includes computer calculation of position in three-dimensional space of ort of radius-vector of support (calculated, a priori assumed) orbit, rigid attachment of optical-electronic device on the body of spacecraft and measurement of coordinates and brightness of stars, which are in the field of view during navigational sessions, in it.

EFFECT: increased number of performed tasks, expanded capabilities of method application environment for any orbits, reduced number of measuring devices and mass and size characteristics of onboard system for controlling a spacecraft.

2 dwg

Sun attitude pickup // 2308005

FIELD: measuring equipment, applicable for determination of the Sun angular coordinates in the spacecraft coordinate system.

SUBSTANCE: the Sun attitude pickup has an optical system made in the form of a wide-angle lens including an inlet and outlet plano-convex lenses with a diaphragm placed between them, an optical element is positioned in its holes, matrix photodetector, and a unit for processing of information and computation of coordinates. The refractive indices of the optical components are selected proceeding from the relation: n1≥n2<n3, where n1 - the refractive index of the inlet plano-convex lens; n2 - the refractive index of the optical element; n3 - the refractive index of the outlet plano-convex lens.

EFFECT: obtained information in a wide angular field with a high precision.

3 cl, 1 dwg

FIELD: instrument engineering.

SUBSTANCE: device has optical spectrum filter, slit mask, multi-element photo-sensitive detector, threshold elements, photo-detector register, counter, output register, clock pulse generator. Multi-element photo-sensitive detector consists of elementary photo-detectors placed behind one another along quadratic curve. Normal lines to sensitive areas of each elementary photo-detector and quadratic curve lie in same plane.

EFFECT: higher effectiveness and efficiency.

1 dwg

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