urn:nasa:pds:p10-gtt-cal:data-15min:p10_gtt_15m19810101
1.0
Pioneer 10 GTT Calibrated 15 Minute Count Rate Data for 1981-01-01 00:06:48.705
1.25.0.0
Product_Observational
2009
This file contains half-year files of 15-min count rates and
related parameters from the the Geiger Tube Telescope (GTT) flown
on Pioneer 10. The data were initially provided to NSSDC by the
GTT team at U. Iowa in VMS binary format on magnetic tapes. They
have been converted to ASCII format at GSFC/SPDF.
James Alfred
Van Allen
1
University of Iowa
https://ror.org/036jqmy94
1
2026-03-25
1.0
This is the first product released as part
of the PDS4 bundle. The data themselves are unchanged.
1981-01-01T00:06:55.057Z
1981-06-30T23:57:19.032Z
Science
Calibrated
Heliosphere
Particles
Electrons
Energetic
Heliosphere
Particles
Ions
Energetic
Heliosphere
Particles
Electrons
Cosmic Ray
Heliosphere
Particles
Ions
Cosmic Ray
Pioneer 10
Mission
urn:nasa:pds:context:investigation:mission.pioneer_10
data_to_investigation
Geiger Tube Telescope (GTT)
Instrument
urn:nasa:pds:context:instrument:gtt.p10
is_instrument
Pioneer 10
Host
urn:nasa:pds:context:instrument_host:spacecraft.p10
is_instrument_host
Solar Wind
Plasma Stream
urn:nasa:pds:context:target:plasma_stream.solar_wind
data_to_target
Post-Jupiter Cruise
0.06
102
Electrons
Count Rate
0.06
102
Ions
Count Rate
Proton
urn:nasa:pds:p10-gtt-cal:document:15min-data-desc::1.0
data_to_document
p10_gtt_15m19810101.tab
2026-03-05T00:00:00.000Z
11023246
0fee92757f429c36f078a2fd0df0f405
This data file is unmodified from the PDS3 version.
0
7618
Carriage-Return Line-Feed
21
5
1447
TIMECODE
1
1
ASCII_Date_Time_YMD
24
ASCII timecode format of start time (in spacecraft event time).
YEAR
2
27
ASCII_NonNegative_Integer
3
Year of Data (e.g., 72, 73, ...) in Earth Received Time (ERT). Earth
received time (ERT) for the data.
DAY
3
31
ASCII_NonNegative_Integer
3
Day of Data in Earth Received Time (ERT). Earth received time (ERT) for
the data.
BEG_DAY_FRAC
4
35
ASCII_Real
10
Beginning Day Fraction in Earth Received Time (ERT). Beginning time is
the time of the first data point found in the interval.
END_DAY_FRAC
5
46
ASCII_Real
10
Ending Day Fraction in Earth Received Time (ERT). Ending time is the
time of the last data point in the interval.
SC_ID
6
57
ASCII_NonNegative_Integer
2
Spacecraft ID (10 or 11).
PERIOD_LEN
7
61
ASCII_NonNegative_Integer
2
min
Length of Period in Minutes. Since these are quarter hour averages, this
number will be 15.
PERIOD_TYPE
8
66
ASCII_NonNegative_Integer
1
Period Type. A number assigned to describe the accumulation period; for
quarter hour averages it will be 1.
NUM_SAMPLES
9
68
ASCII_NonNegative_Integer
3
Number of samples this interval.
12
1
0
73
156
EFF_COUNTS
1
ASCII_Real
13
Counts
Effective Counts for each of 12 detectors. Detector order: (1) G, (2) A,
(3) B, (4) G, (5) AB, (6) ABC, (7) C, (8) D, (9) ABC, (10) DEF, (11)
G+G, (12) ABC+ABC.
12
1
0
230
156
SUM_RAW_NORM
1
ASCII_Real
13
(Sum of Raw Counts) / 0.09375 for each of 12 detectors. Detector order:
(1) G, (2) A, (3) B, (4) G, (5) AB, (6) ABC, (7) C, (8) D, (9) ABC,
(10) DEF, (11) G+G, (12) ABC+ABC.
12
1
0
387
156
COUNT_RATE_AVE
1
ASCII_Real
13
Counts/s
Counting Rate Average in Counts/sec for each of 12 detectors. Detector
order: (1) G, (2) A, (3) B, (4) G, (5) AB, (6) ABC, (7) C, (8) D, (9)
ABC, (10) DEF, (11) G+G, (12) ABC+ABC.
12
1
0
544
156
SIGMA
1
ASCII_Real
13
Sigma (Standard Deviation) for each of 12 detectors. Detector order: (1)
G, (2) A, (3) B, (4) G, (5) AB, (6) ABC, (7) C, (8) D, (9) ABC, (10)
DEF, (11) G+G, (12) ABC+ABC.
12
1
0
1172
156
SUM_RAW_COUNTS
1
ASCII_Real
13
Sum of Raw Counts for each of 12 detectors. Detector order: (1) G, (2)
A, (3) B, (4) G, (5) AB, (6) ABC, (7) C, (8) D, (9) ABC, (10) DEF, (11)
G+G, (12) ABC+ABC.
NUM_ERRORS
16
1330
ASCII_NonNegative_Integer
1
Number of Errors this Interval.
DAY_FRAC_1950
17
1333
ASCII_Real
9
Day and Day Fraction since 1950.0. This time is spacecraft event time
for the center time of the data used in the sum.
RADIUS_SC_EARTH
18
1347
ASCII_Real
6
AU
Radius to Spacecraft from Earth in AU.
EARTH_SUN_DIST
19
1357
ASCII_Real
5
AU
Earth-Sun Distance in AU. All positional coordinates are referred to the
equinox/ecliptic of date.
RADIUS_SC_SUN
20
1365
ASCII_Real
6
AU
Radius to Spacecraft from the Sun in AU. All positional coordinates are
referred to the equinox/ecliptic of date.
CEL_LON_EARTH
21
1374
ASCII_Real
6
deg
Celestial Longitude of Earth (Degrees). Measured in a reference system
using the Sun as the reference body and the true ecliptic of date as the
reference plane. Longitudes are measured eastward from the line between
the vernal equinox and the Sun. Latitudes are measured from the plane;
northward is positive. All positional coordinates are referred to the
equinox/ecliptic of date.
CEL_LON_SC
22
1383
ASCII_Real
6
deg
Celestial Longitude of Spacecraft (Degrees). Measured in a reference
system using the Sun as the reference body and the true ecliptic of date
as the reference plane. Longitudes are measured eastward from the line
between the vernal equinox and the Sun. Latitudes are measured from the
plane; northward is positive. All positional coordinates are referred to
the equinox/ecliptic of date.
LON_SOL_EQUATOR
23
1391
ASCII_Real
7
deg
Longitude of Solar Equator + 270 (Degrees). Calculated quantity.
Inclination of solar equator to ecliptic I=7.25 degrees. Longitude of
the ascending node of the solar equator on the ecliptic: Omega=73
degrees+40 minutes+50.25*t seconds, where t is the time in years
reckoned from 1850.0. Reference: Explanatory Supplement to the
Astronomical Ephemeris and the American Ephemeris and Nautical Almanac,
1961, page 307.
CEL_LAT_EARTH
24
1400
ASCII_Real
13
deg
Celestial Latitude of Earth (Degrees). Measured in a reference system
using the Sun as the reference body and the true ecliptic of date as the
reference plane. Longitudes are measured eastward from the line between
the vernal equinox and the Sun. Latitudes are measured from the plane;
northward is positive. All positional coordinates are referred to the
equinox/ecliptic of date.
CEL_LAT_SC
25
1415
ASCII_Real
9
deg
Celestial Latitude of Spacecraft (Degrees). Measured in a reference
system using the Sun as the reference body and the true ecliptic of date
as the reference plane. Longitudes are measured eastward from the line
between the vernal equinox and the Sun. Latitudes are measured from the
plane; northward is positive. All positional coordinates are referred to
the equinox/ecliptic of date.
HELIOLAT_SC
26
1426
ASCII_Real
9
deg
Heliographic Latitude of Spacecraft (Degrees). Calculated quantity.
Inclination of solar equator to ecliptic I=7.25 degrees. Longitude of
the ascending node of the solar equator on the ecliptic: Omega=73
degrees+40 minutes+50.25*t seconds, where t is the time in years
reckoned from 1850.0. Reference: Explanatory Supplement to the
Astronomical Ephemeris and the American Ephemeris and Nautical Almanac,
1961, page 307.
HELIOLAT_EARTH
27
1436
ASCII_Real
10
deg
Heliographic Latitude of Earth (Degrees). Calculated quantity.
Inclination of solar equator to ecliptic I=7.25 degrees. Longitude of
the ascending node of the solar equator on the ecliptic: Omega=73
degrees+40 minutes+50.25*t seconds, where t is the time in years
reckoned from 1850.0. Reference: Explanatory Supplement to the
Astronomical Ephemeris and the American Ephemeris and Nautical Almanac,
1961, page 307.