Celestial Mechanical ExperimentCelestial Mechanical Experiment in Phobos Soil project. in Phobos Soil project.Ultra stable occilator on S/C boardUltra stable occilator on S/C board
Linkin V., Kosov A., Gotlib V., Zotov V., Korogod V., Skulachev
D., Strukov I.
IKI RAN
Scintific ImplicationScintific Implication
Phobos, Mars EfemeridsPhobos internal structureAsteroid Masses Time variability of gravitational
constantTest of General relativityConnection VLBI and dinamical
coordinats
Requirments for MesurimentsRequirments for Mesuriments
Phobos
Eccurecy:
Distance ~ 5m, Doppler velocity ~0.1mm/s,
VLBI ~ 10m (on Phobos)
S/C
Earth
D, D’, VLBI
Peculiarity of ExperimentPeculiarity 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
VLBIVLBIVLBIVLBI
D
D
B B
resolution
VLBIVLBIVLBIVLBI不同的到达时间
原子钟
原子钟
互相关 ,信号检测
可观测 :振幅相位延迟延迟率
VLBI 结构图
VeryLongBaselineInterferometry ： ADCs 、 independent local oscillator
VeryLongBaselineInterferometry ： ADCs 、 independent local oscillator From 1960sFrom 1960s
Delta VLBI
DOR/DOD/VLBI Delay observables:
several ns
RUSSIA VLBI RUSSIA VLBI networknetwork
Deep Space VLBI Deep Space VLBI SystemSystem
SHANGHAISHANGHAI
BEIJINGBEIJING
KUNMINGKUNMING
JIVEJIVEUMQIJIVEJIVEUMQI
RUSSIA-01RUSSIA-01
VLBI CenterVLBI Center
Intelnet
Intelnet
RUSSIA-02RUSSIA-02
RUSSIA-03RUSSIA-03
FGSC VLBI FrequencyFGSC VLBI Frequency
CW: 84000MHz
tone: +/- 20MHz
1Watt
History of this ExperimentHistory 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)
