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Celestial Mechanical Experiment in Phobos Soil project. Ultra stable occilator on S/C board

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. Phobos, Mars Efemerids Phobos internal structure Asteroid Masses

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Celestial Mechanical Experiment in Phobos Soil project. Ultra stable occilator on S/C board

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  1. 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

  2. Scintific Implication • Phobos, Mars Efemerids • Phobos internal structure • Asteroid Masses • Time variability of gravitational constant • Test of General relativity • Connection VLBI and dinamical coordinats

  3. Requirments for Mesuriments • Phobos Eccurecy: Distance ~ 5m, Doppler velocity ~0.1mm/s, VLBI ~ 10m (on Phobos) D, D’, VLBI S/C Earth

  4. Peculiarity of Experiment • Mmars >> Mphob >> MS/C, Dmars >> D phob • Nongravitational forses for Phobos are negligible for orbit determination. • It is possibal to integrate equation of motion during long time

  5. D B VLBI resolution

  6. VLBI VLBI结构图 不同的到达时间 VeryLongBaselineInterferometry：ADCs、independent local oscillator 原子钟 原子钟 From 1960s 可观测: 振幅 相位 延迟 延迟率 互相关,信号检测

  7. Delta VLBI DOR/DOD/VLBI • Delay observables: several ns

  8. RUSSIA VLBI network

  9. Deep Space VLBI System SHANGHAI Intelnet BEIJING VLBI Center KUNMING JIVEJIVEUMQI RUSSIA-01 RUSSIA-02 RUSSIA-03

  10. FGSC VLBI Frequency • CW: 84000MHz tone: +/- 20MHz 1Watt

  11. History of this Experiment • Project «Phobos» 1988, DAS • Participants: IKI, IPM, MGU(GAISH), • JPL(US), SA (Fr) • Mesuriments: D,D’,Libration, VLBI Wanted Participants for this Experiment for Phobos Soil Project IKI, IPM, MGU (GAISH), JIVE (EU), JPL (US)

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