かぐや (SELENE) による測月ミッションの概要と，子衛星おきな・おうな (Rstar・Vstar) の開発並びに軌道上特性

DOI Web Site 被引用文献10件 参考文献16件

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タイトル別名
  • Mission Outline of Selenodesy by KAGUYA (SELENE) and Developments and On-orbit Properties of Sub-satellites: OKINA and OUNA (Rstar and Vstar)
  • カグ ヤ SELENE ニ ヨル ソクゲツ ミッション ノ ガイヨウ ト コ エイセイオキ ナ オウ ナ Rstar Vstar ノ カイハツ ナラビニ キドウ ジョウ トクセイ

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SELENE Main Orbiter (KAGUYA) has separated two small sub-satellites; (1) the Relay Satellite “OKINA (Rstar)”, and (2) the VLBI Radio Satellite “OUNA (Vstar)”. These sub-satellites started to perform 4-way Doppler measurements using Relay Satellite Transponder (RSAT) and multi-frequency phase-delay differential VLBI using VLBI Radio Sources (VRAD) for lunar gravity mapping. We have developed the frequency conversion system, multi frequency S/X-band vertical dipole antenna, and light weighted S-band patch antenna to perform these missions. Simple structured release mechanism has also been developed and confirmed its performance by ground test and orbital demonstration using micro-Lab Sat.<BR> Initial check out were executed and properties of satellite bus equipments, onboard mission instruments, and observation systems including ground stations were evaluated. Electric power and thermal control subsystems have shown that they conduct as designed and inspected in the ground tests. The release mechanisms have given the spin which can maintain the stability of the satellite attitudes. Communication functions of mission instruments conform to the link budgets. These results suggest that OKINA and OUNA have enough performances to produce efficient data by RSAT/VRAD gravity observations.

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