CCSD3ZF0000100000001NJPL3IF0PDSX00000001 PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "S. Joy, June, 1993; streamlined S. Joy, Nov 11, 1998." OBJECT = DATA_SET DATA_SET_ID = "PVO-V-OEFD-3--EFIELD-HIRES-V1.0" OBJECT = DATA_SET_INFORMATION DATA_SET_NAME = " PVO VENUS SC POSITION DERIVED VSO COORDS 12 SECOND VER1.0" DATA_SET_COLLECTION_MEMBER_FLG = N START_TIME = 1978-12-05T07:20:07.282 STOP_TIME = 1992-10-08T16:30:37.204 DATA_SET_RELEASE_DATE = 1993-06-30 PRODUCER_FULL_NAME = "MURIEL KNIFFIN" DETAILED_CATALOG_FLAG = N DATA_OBJECT_TYPE = "TIME SERIES" DATA_SET_DESC = " This data set contains wave electric field amplitudes measured at four different frequencies by the Pioneer Venus Orbiter Electric Field Detector. The four frequencies are 100 Hz, 730 Hz, 5.4 kHz, 30 kHz. The frequency filters are narrow-band, with a 30% bandwidth. Thus wave intensities are given in V2/m2/Hz. The filters are continuously active, but data are only provided at a rate determined by the spacecraft telemetry rate. The wave antenna is oriented perpendicular to the spacecraft spin axis, and so the wave instrument measures only wave fields in the spacecraft spin plane. Spin modulation of naturally occurring signals can be used to obtain two dimensional wave field information. The wave antenna is a small Y-shaped structure, with effective separation of 0.76 meters. The spin phase of the effective dipole is included within the high resolution data set for each of the channels, which are sampled at different times. The Electric field data file contains the following information: RECORD LENGTH = 40 NUMBER OF COLUMNS = 9 OPERATING SYSTEM = SUN/UNIX # NAME UNITS SOURCE DESCRIPTION 001 UT SECONDS PVO 002 E100HZ (V/M)^2/H PVO EFD 003 E730HZ (V/M)^2/H PVO EFD 004 E5.4KHZ (V/M)^2/H PVO EFD 005 E30KHZ (V/M)^2/H PVO EFD 006 E100 PH DEG PVO EFD PHASE 007 E730 PH DEG PVO EFD PHASE 008 E5.4K PH DEG PVO EFD PHASE 009 E30K PH DEG PVO EFD PHASE MISSING DATA FLAG = 1.000000E+32 AVERAGE INTERVAL = HIGH RESOLUTION There is also a file available that contains ephemeris data. This is located in the directory /DATA/EPHEM and has the following information: RECORD LENGTH = 64 NUMBER OF COLUMNS = 15 OPERATING SYSTEM = SUN/UNIX # NAME UNITS SOURCE DESCRIPTION 001 UTIME SECONDS PVO 002 X VSO RV PVO SEDR Position X 003 Y VSO RV PVO SEDR Position Y 004 Z VSO RV PVO SEDR Position Z 005 ALT KM PVO SEDR Altitude 006 SZA DEG PVO SEDR Solar Zenith Angle 007 PLONG DEG PVO SEDR Planetary longitude 008 PLAT DEG PVO SEDR Planetary latitude 009 SPX VSO PVO SEDR Spin axis X 010 SPY VSO PVO SEDR Spin axis Y 011 SPZ VSO PVO SEDR Spin axis Z 012 CLAT DEG PVO SEDR Celestial latitude 013 CLONG DEG PVO SEDR Celestial longitude 014 ELONG DEG PVO SEDR Earth celestial longitude 015 RSUN AU PVO SEDR Distance to the Sun MISSING DATA FLAG = 1.000000E+32 AVERAGE INTERVAL = 00:00:12.000 Other Ancillary data productions are available. A file containing phase and offset data is located in the directory /DATA/PHASEOFF. It contains the following information: RECORD LENGTH = 56 NUMBER OF COLUMNS = 13 OPERATING SYSTEM = SUN/UNIX # NAME UNITS SOURCE DESCRIPTION 001 UT SECONDS PVO 002 E100 PH DEG PVO EFD Modulation phase 003 E100 AMP V/M/HZ.5 PVO EFD Modulation amplitude 004 E730 PH DEG PVO EFD Modulation phase 005 E730 AMP V/M/HZ.5 PVO EFD Modulation amplitude 006 E5.4KPH DEG PVO EFD Modulation phase 007 E5.4KAMP V/M/HZ.5 PVO EFD Modulation amplitude 008 E30K PH DEG PVO EFD Modulation phase 009 E30K AMP V/M/HZ.5 PVO EFD Modulation amplitude 010 TAV NT PVO MAG Average T sensor offset 011 GDIFFX NT PVO MAG S/C field G correction X 012 GDIFFY NT PVO MAG S/C field G correction Y 013 GDIFFZ NT PVO MAG S/C field G correction Z MISSING DATA FLAG = 1.000000E+32 AVERAGE INTERVAL = 00:00:24.000 A file containing engineering data is located in the directory /DATA/ENGR. It contains the following information: RECORD LENGTH = 64 NUMBER OF COLUMNS = 14 OPERATING SYSTEM = SUN/UNIX # NAME UNITS SOURCE DESCRIPTION 001 UT SECONDS PVO 002 ElecT DEG PVO MAG Electronics temperature 003 PsensT DEG PVO MAG P&T sensor temperature 004 GsensT DEG PVO MAG G sensor temperature 005 MODE 1:2:3 PVO MAG Fast Normal or Gradiometer 006 SMPLRATE 1 or 3 PVO MAG Sample format 007 CAL 0 or 1 PVO MAG Calibration 008 SAS 1:2:4 PVO MAG Spin average select 009 FORMAT 0-15 PVO EDR TLM data format 010 BITRAT BITS/S PVO EDR Bit rate 011 SPIN SECONDS PVO SEDR Spin period 012 TFS SECONDS PVO SEDR Pulse time 013 SMINR SECONDS PVO SEDR Sun-RIP difference 014 PTFLAG PVO SEDR Pulse Time flag MISSING DATA FLAG = 1.000000E+32 FORMAT: 0:ENG,1:UNK,2:UNK,3:PGM,4:ACS,5:CMRO,6:PYBK,7:DMRO,8:LACR, 9:PERA,10:PERB,11:PERC,12:PERD,13:PERE,14:APOA,15:APOB A file containing instrument status information is located in the directory /DATA/INSTSTAT. It contains the following information: RECORD LENGTH = 56 NUMBER OF COLUMNS = 13 OPERATING SYSTEM = SUN/UNIX # NAME UNITS SOURCE DESCRIPTION 001 UT SECONDS PVO 002 PCOS NT PVO MAG Norm(P cos amp) 003 PSIN NT PVO MAG Norm(P sin amp) 004 DX NT PVO MAG Norm(Tsin-Gcos) 005 DY NT PVO MAG Norm(Gsin+Tcos) 006 DZ NT PVO MAG Norm(Gdc-Pdc) 007 RAMP PVO MAG S2xy / S1xy 008 DPHS DEG PVO MAG Phase S2 - S1 009 DC1 NT PVO MAG DC of S1 010 DC2 NT PVO MAG DC of S2 011 ZCOS NT PVO MAG Cos amp of Z sens 012 ZSIN NT PVO MAG Sin amp of Z sens 013 ZDC NT PVO MAG DC amp of Z sens MISSING DATA FLAG = 1.000000E+32 AVERAGE INTERVAL = 00:00:24.000" CONFIDENCE_LEVEL_NOTE = " The instrument noise level (and hence sensitivity) is determined by the ambient environment at the time of observation. Photo- electrons emitted from various spacecraft surfaces appear to be a strong source of electric field interference. As a consequence data acquired when the spacecraft is in sunlight often are contaminated by spin modulated interference, especially when the spacecraft is in the low density solar wind, where the Debye length is several meters. The noise is usually lowest when the antenna elements are in the spacecraft shadow. The noise level is also reduced when the spacecraft is deep within the dayside ionosphere, where the Debye length is much smaller than the antenna size. The noise is not present when the spacecraft is within the optical shadow of the planet. In this case, however, additional noise features are observed (mainly at 100 Hz) when the spacecraft is at low altitude within the nightside ionosphere. This interference is readily discriminated in the high resolution data, where the noise is present as a sharp pulse occurring twice per spin. " END_OBJECT = DATA_SET_INFORMATION OBJECT = DATA_SET_TARGET TARGET_NAME = VENUS END_OBJECT = DATA_SET_TARGET OBJECT = DATA_SET_HOST INSTRUMENT_HOST_ID = PVO INSTRUMENT_ID = OEFD END_OBJECT = DATA_SET_HOST OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = SCARFETAL1979B END_OBJECT = DATA_SET_REFERENCE_INFORMATION OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = TAYLORETAL1979A END_OBJECT = DATA_SET_REFERENCE_INFORMATION OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = TAYLORETAL1979B END_OBJECT = DATA_SET_REFERENCE_INFORMATION OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = SCARFETAL1980A END_OBJECT = DATA_SET_REFERENCE_INFORMATION OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = SCARFETAL1980B END_OBJECT = DATA_SET_REFERENCE_INFORMATION OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = SCARFETAL1980C END_OBJECT = DATA_SET_REFERENCE_INFORMATION OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = SCARFETAL1983 END_OBJECT = DATA_SET_REFERENCE_INFORMATION OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = RUSSELL1991 END_OBJECT = DATA_SET_REFERENCE_INFORMATION OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = STRANGEWAY1991 END_OBJECT = DATA_SET_REFERENCE_INFORMATION END_OBJECT = DATA_SET END