Data Set Information
|
DATA_SET_NAME |
PVO VENUS RADIO SCIENCE OPENLOOP ODR VERSION 1.0
|
DATA_SET_ID |
PVO-V-ORSE-1-ODR-OPENLOOP--V1.0
|
NSSDC_DATA_SET_ID |
|
DATA_SET_TERSE_DESCRIPTION |
Analysis of variations in the amplitude, phase, and frequency of the
signal provides information on the ring structure, atmospheric density,
magnetic field, and charged-particle environment of planets which
occult the spacecraft.
|
DATA_SET_DESCRIPTION |
The DSP-R is a computer-controlled subsystem that digitally samples a
received spacecraft signal (both X and S-band) through the
use of four analog-to-digital (A-D) converters.
The digitized samples, along with the monitor data
necessary to reconstruct the signal, are recorded on tape, and/or
transmitted in realtime to SFOC. Analysis of variations in the
amplitude, phase, and frequency of the signal provides information
on the ring structure, atmospheric density, magnetic field, and
charged-particle environment of planets which occult the spacecraft.
Additionally, this signal is needed for gravity wave detection.
The DSP-R digitally samples the received spacecraft signal with 8-bit
or 12-bit resolution and creates records of varying lengths, depending
on the sample rate and resolution. Each record is composed of (1)
a header containing information on system configuration, time-tagged
receiver local oscillator values, etc., and (2) a block of digital
data from the four A-D converters.
Time Tag Offset
The sampled data are later than the reported time tag by two intervals
of the sample rate of a single A-D converter. This means that in each
record the ADC data which corresponds with the time tag is the third
set of ADC samples in the record, not the first set.
|
DATA_SET_RELEASE_DATE |
1993-07-01T00:00:00.000Z
|
START_TIME |
1978-12-05T03:11:12.862Z
|
STOP_TIME |
1992-10-07T07:46:27.756Z
|
MISSION_NAME |
PIONEER VENUS
|
MISSION_START_DATE |
1968-06-01T12:00:00.000Z
|
MISSION_STOP_DATE |
1992-10-07T12:00:00.000Z
|
TARGET_NAME |
VENUS
|
TARGET_TYPE |
PLANET
|
INSTRUMENT_HOST_ID |
PVO
|
INSTRUMENT_NAME |
ORBITER RADIO SCIENCE EXPERIMENT
|
INSTRUMENT_ID |
ORSE
|
INSTRUMENT_TYPE |
RADIO SCIENCE
|
NODE_NAME |
Planetary Plasma Interactions
|
ARCHIVE_STATUS |
ARCHIVED
|
CONFIDENCE_LEVEL_NOTE |
The ODR dataset is a raw data product with all that implies.
|
CITATION_DESCRIPTION |
Chong, D., PVO-V-ORSE-1-ODR-OPENLOOP--V1.0,
PVO VENUS RADIO SCIENCE OPENLOOP ODR VERSION 1.0,
NASA Planetary Data System, 1993.
|
ABSTRACT_TEXT |
The DSP-R is a computer-controlled
subsystem that digitally samples a received spacecraft signal (both X
and S-band) through the use of four analog-to-digital (A-D) converters.
The digitized samples, along with the monitor data necessary to
reconstruct the signal, are recorded on tape, and/or transmitted in
realtime to SFOC. Analysis of variations in the amplitude, phase, and
frequency of the signal provides information on the ring structure,
atmospheric density, magnetic field, and charged-particle environment of
planets which occult the spacecraft. Additionally, this signal is needed
for gravity wave detection.
|
PRODUCER_FULL_NAME |
DWAYNE CHONG
|
SEARCH/ACCESS DATA |
Planetary Plasma Interactions Website
|
|