| 摘要 |
FIELD: instrument making. ^ SUBSTANCE: device for choosing astronomical objects under observation from orbital space vehicle (SV) includes global map with star map applied to it, two rings enveloping the global map, the centres of which are aligned with centre of global map and element the outline projection of which to global map surface forms the circle. The first ring is fixed above points of poles of global map with possibility of ring rotation around global map rotation axis. The second ring is fixed on the first ring at cross points of the first ring with equator plane of global map with possibility of rotation of the second ring till the position in which the plane of the second ring forms together with global map equator plane the angle equal to inclination angle of SV orbit. Peculiar feature of the device is that the element in the form of half of the ring, which is fixed on the second ring with possibility of its movement, is introduced to it. The element the outline projection of which to the global map surface forms the circle restricts the segment of global map surface with angle of the planet disc observed from SV. ^ EFFECT: providing the display on celestial globe of areas which can be observed from SV and areas hidden for SV observation with the planet around which SV rotates at various SV positions on orbit pass of SV. ^ 3 cl, 4 dwg |
