Celestial Mechanical Experiment in Phobos Soil project Ultra
Celestial Mechanical Experiment in Phobos Soil project. Ultra stable occilator on S/C board Linkin V. , Kosov A. , Gotlib V. , Zotov V. , Korogod V. , Skulachev D. , Strukov I. IKI RAN
Scintific Implication l Phobos, Mars Efemerids l Phobos internal structure l Asteroid Masses l Time variability of gravitational constant l Test of General relativity l Connection VLBI and dinamical coordinats
Requirments for Mesuriments l Phobos S/C D, D’, VLBI Earth Eccurecy: Distance ~ 5 m, Doppler velocity ~0. 1 mm/s, VLBI ~ 10 m (on Phobos)
Peculiarity of Experiment l Mmars >> Mphob >> MS/C, Dmars >> D phob Nongravitational forses for Phobos are negligible for orbit determination. l It is possibal to integrate equation of motion during long time l
VLBI D B resolution
VLBI结构图 不同的到达�� Very. Long. Baseline. Interferometry: ADCs、independent local oscillator 原子� From 1960 s 可�� : 振幅 相位 延� 延�率 互相关, 信号��
Delta VLBI DOR/DOD/VLBI l Delay observables: several ns l
RUSSIA VLBI network
Deep Space VLBI System SHANGHAI Intelnet BEIJING KUNMING JIVEUMQI RUSSIA-01 RUSSIA-02 RUSSIA-03 VLBI Center
FGSC VLBI Frequency l CW: 84000 MHz tone: +/- 20 MHz 1 Watt
History of this Experiment Project «Phobos» 1988, DAS l Participants: IKI, IPM, MGU(GAISH), l JPL(US), SA (Fr) l Mesuriments: D, D’, Libration, VLBI l Wanted Participants for this Experiment for Phobos Soil Project IKI, IPM, MGU (GAISH), JIVE (EU), JPL (US)
- Slides: 11