urn:nasa:pds:context:instrument:rss.p12 1.0 1.7.0.0 Product_Context 2016-10-01 1.0 extracted metadata from PDS3 catalog and modified to comply with PDS4 Information Model urn:nasa:pds:context:instrument_host:spacecraft.p12::1.0 instrument_to_instrument_host Sjogren, W.L., R.J. Phillips, P.W. Birkeland, and R.N. Wimberly, Gravity Anomalies On Venus, J. Geophys. Res., 85, 8295-8302, 1980. reference.SJOGRENETAL1980 RADIO SCIENCE SUBSYSTEM Atmospheric Sciences not applicable not applicable INSTRUMENT: RADIO SCIENCE SUBSYSTEM SPACECRAFT: PIONEER VENUS ORBITER Instrument Information ====================== Instrument Id : RSS Instrument Host Id : P12 Instrument Name : RADIO SCIENCE SUBSYSTEM Instrument Type : RADIO SCIENCE Instrument Description ====================== The radio system is composed primarily of an ultrastable oscillator (1 part in 10**12), a ground-based transmitter and receiver, a spacecraft transmitter and receiver, and antennae. The radio signal (approximately 2200 MHz) is transmitted from one of the three Deep Space Station antennae (Goldstone, California; Madrid, Spain; or Canberra, Australia) and then received at the spacecraft. The signal is immediately retransmitted (there is a multiplication by 240/221 to prevent feedback into the spacecraft receiver loop) and then received at earth, where it is differenced with the originally transmitted signal. A detailed description is given by the Deep Space Network/Flight Project Design Handbook, Jet Propulsion Laboratory, TRK/20, Doc. 180-5, Rev D, Pasadena, Calif., 1979. The difference in frequency (the Doppler shift) can be measured to less than 0.01 Hz S band (about 0.65 mm/s) for a 5-second averaging time. However, there are error sources which frequently degrade this accuracy. Such things as the earth's troposphere and ionosphere, the Venus atmosphere, and space plasma cause the data noise level to increase by several factors. The noise levels were very dynamic and changed significantly from day to day. In some cases where solar conjunction was approaching, the noise increased by a factor of 10 or more and made the data unusable. The data are displayed as residuals which were obtained by differencing the raw observation with the theoretical calculation. Science Objectives ================== UNKNOWN Operational Considerations ========================== NOT APPLICABLE Calibration Description ======================= NOT APPLICABLE Section 'RSS' ============= Total Fovs : UNK Data Rate : UNK Scan Mode Id : UNK Sample Bits : UNK 'RSS' Detectors --------------- RSSDETEB RSSDETSC 'RSS' Electronics ----------------- RSSELECEB RSSELECSC In modes -------- OPERATING 'RSS' Section FOV Shape 'UNK' ----------------------------- Section Id : RSS Fovs : UNK Horizontal Pixel Fov : UNK Vertical Pixel Fov : UNK Horizontal Fov : UNK Vertical Fov : UNK 'RSS' Section Parameter 'RSSDETEB POWER' ---------------------------------------- RSSDETEB Power is the power measured by the Deep Space Network antenna from the spacecraft antenna for tracking purposes. Instrument Parameter Name : RSSDETEB POWER Sampling Parameter Name : TIME Instrument Parameter Unit : WATTS Minimum Instrument Parameter : UNK Maximum Instrument Parameter : UNK Minimum Sampling Parameter : UNK Maximum Sampling Parameter : UNK Noise Level : UNK Sampling Parameter Interval : UNK Sampling Parameter Resolution : UNK Sampling Parameter Unit : SECOND Instrument Detector 'RSSDETEB' ============================== Detector Type : ANTENNA Detector Aspect Ratio : UNK Minimum Wavelength : UNK Maximum Wavelength : UNK Nominal Operating Temperature : UNK Description ----------- See the instrument description for details on the earth-based antennas. Sensitivity ----------- UNKNOWN Instrument Detector 'RSSDETSC' ============================== Detector Type : ANTENNA Detector Aspect Ratio : UNK Minimum Wavelength : UNK Maximum Wavelength : UNK Nominal Operating Temperature : UNK Description ----------- See the instrument description for details on the spacecraft antenna. Sensitivity ----------- UNKNOWN Instrument Electronics 'RSSELECEB' ================================== Description ----------- See the instrument description for details on the earth-based electronics. Instrument Electronics 'RSSELECSC' ================================== Description ----------- See the instrument description for details on the spacecraft electronics. Instrument Mode 'OPERATING' =========================== Data Path Type : UNK Gain Mode Id : UNK Instrument Power Consumption : UNK In sections ----------- RSS Description ----------- UNKNOWN Mounted On Platform 'PIONEER VENUS ORBITER' =========================================== Description ----------- Please see Spacecraft Description.