Galileo Photpolarimeter data (1991-10-29 to 1991-10-30)
Data are stored in single orbit ASCII files (*.TAB).
All of the data files have the same internal structure which is described
by the single format file PPRRDR.FMT. File structure characteristics
which may vary from file to file (# of records, start/stop time, etc.)
are described in the individual PDS label files (*.LBL).
/-------------------------\
| D A T A |
\-------------------------/
Columns in all data files:
=====================================================
name type description
-----------------------------------------------------
pETYDOY i5 SPACECRAFT_EVENT_TIME_YYDOY
Spacecraft event time year minus 1900 and day-of-year (DOY)
expressed as a single integer formed by adding DOY to
1000*(year-1900).
SpETHour i2 SPACECRAFT_EVENT_TIME_HOURS
Spacecraft event time hours within the current DOY
SpETSec i4 SPACECRAFT_EVENT_TIME_SEC
Spacecraft event time seconds within the current hour.
SpETMSec i3 SPACECRAFT_EVENT_TIME_MSEC
Spacecraft event time milliseconds within the current second.
RIM i7 RIM
Count of the corrected spacecraft clock RIM counter, which
increments by one (1) every 60 and 2/3 seconds, or 91 minor
frames.
MOD91 i2 MOD91
Count of the corrected spacecraft clock MOD91 counter, which
increments by one (1) every 2/3 second.
RightAsc f7.3 RIGHT_ASCENSION
Right ascension of the instrument boresight direction for the
scan platform.
Declin f7.3 DECLINATION
Declination of the instrument boresight direction for the
scan platform.
ConAng f7.3 CONE_ANGLE
Cone angle of the instrument boresight direction for the scan
platform.
CrsCnAng f7.3 CROSS_CONE_ANGLE
Cross-cone, or clock, angle of the instrument boresight
direction for the scan platform.
OpMode i1 OPERATION_MODE
Mode of operation of the PPR instrument;
0 - transition mode,
1 - cycle mode,
2 - PhotoPolarimetry and Photometry (PP/PH) mode,
3 - photometry mode,
4 - radiometry mode,
5 - position select mode.
FiltrPos i2 FILTER_POSITION
Indicates the filter/retarder wheel position at which the
data sample pair SAMPLE_A_DATA and SAMPLE_B_DATA are
acquired.
CLBmSqTg i1 CAL_LAMP_BOOM_SEQUENCE_TAG
Indicator used both to indicate that either internal or
external calibration lamp is on and to serve as a marker that
separates data taken on successive s/c spins if boom sequence
operation is active.
SmpAData i4 SAMPLE_A_DATA
Is the first PP/PH science data sample of the simultaneously
obtained pair corresponding to the orthogonal polarization
components separated by the PPR Wollaston prism or a
radiometry scene sample.
SmpBData i4 SAMPLE_B_DATA
Is the second of the pair of PP/PH science data samples or a
science temperature data sample if SAMPLE_A_DATA is
radiometry data.
RdomRadi f6.1 RADIOMETRY_RADIANCE
The radiometry scene radiance in net data number,
specifically, the original detector output in DN, corrected
for the contributions to the signal by internal instrument
elements and minus the dark level offset. Should in general
be positive, but at low signal levels may be negative owing
to instrument noise. This field is left blank for
non-radiometry data samples.
BrghtTmp f5.1 BRIGHTNESS_TEMPERATURE
The radiometry scene brightness temperature in kelvins (K)
converted from the radiometry scene radiance in DN. If the
radiance DN value is negative, the brightness temperature
displayed is zero. Because of the dynamic range of the
instrument for radiometry measurements, conversions for
temperatures greater than 330 K are not possible, so in such
instances the brightness temperature displayed is zero. This
field is left blank for non-radiometry data samples.
Intnsity f6.1 INTENSITY
Polarimetry or photometry scene spectral radiance, or
intensity, specifically, the total intensity, or sum of the
two orthogonal components minus offsets in data number form
without adjustment for instrument gain setting. This field
is left blank for radiometry data samples.
AbsIntns f8.6 ABSOLUTE_INTENSITY
Polarimetry or photometry scene spectral radiance, or
intensity, specifically, the total intensity in absolute
units of watts per square centimeter per steradian per
nanometer. This field is left blank for radiometry data
samples.
LinerPol f5.2 LINEAR_POLARIZATION
Linear polarization degree in percent. This field is left
blank except for data samples acquired at the third filter
wheel position of the set of three retarder orientations for
a given polarimetry band, i.e., filter wheel positions 5, 11,
and 17.
PolDirec f4.1 POLARIZATION_DIRECTION
Linear polarization direction angle in degrees measured
relative to the instrument baseplate. This field is always
filled to ensure fixed length records for this data file.
Zero is displayed for records corresponding to filter wheel
positions other than 5, 11, and 17.
In the columns RADIOMETRY_RADIANCE, BRIGHTNESS_TEMPERATURE, INTENSITY,
ABSOLUTE_INTENSITY, and LINEAR_POLARIZATION, there are flag values of 1E35.
Note that 1E35 is outside the valid value range as described in the PPRRDR.FMT
format file. These are flags indicating that there is no actual data (column
is blank for that record).
Data Files (.TAB extension)
==============================================================================
Name Records Cols Len Start Stop
------------------------------------------------------------------------------
PPRGA001.TAB 6843 21 120
PPRGA002.TAB 3996 21 120
PPRGA003.TAB 1215 21 120
PPRGA004.TAB 2325 21 120
PPRGA005.TAB 120 21 120
Catalog data which includes instrument and dataset descriptions
are located at:
/CATALOG/GASPRA.CAT
/CATALOG/INST.CAT
==============================================================================
MAX/MIN Statistics for: PPRGA001
------------------------------------------------------------------------------
::::::::::::::
PPRGA001.stats
::::::::::::::
/=====================================================================\
| D A T A F L O W S T A T I S T I C S |
\=====================================================================/
Number of columns in data flow: 21
--------- Aggregate Statistics ----------
Total number of records: 6843
/======================================================================\
| COLUMN | MINIMUM | MAXIMUM | AVERAGE | # FLAGS |
|======================================================================|
|SpETYDOY | 91302| 91302| 91302| 0|
|SpETHour | 6| 19| 14.4358| 0|
|SpETSec | 166| 3596| 1791.63| 0|
|SpETMSec | 0| 999| 528.55| 0|
|RIM | 1.07225e+06| 1.073e+06| 1.07274e+06| 0|
|MOD91 | 0| 90| 39.6528| 0|
|RightAsc | 0| 247.269| 237.658| 0|
|Declin | -21.099| 0| -19.0434| 0|
|ConAng | 0| 144.824| 135.445| 0|
|CrsCnAng | 0| 359.993| 181.55| 0|
|OpMode | 5| 5| 5| 0|
|FiltrPos | 9| 9| 9| 0|
|CLBmSqTg | 0| 0| 0| 0|
|SmpAData | 176| 403| 314.412| 0|
|SmpBData | 33| 193| 80.1586| 0|
|RdomRadi | 1.7e+308| -1.7e+308| NaN| 6843|
|BrghtTmp | 1.7e+308| -1.7e+308| NaN| 6843|
|Intnsity | -12.3| 58| 9.537| 0|
|AbsIntns | 0| 2.85e-09| 5.27247e-10| 0|
|LinerPol | 1.7e+308| -1.7e+308| NaN| 6843|
|PolDirec | 0| 0| 0| 0|
\======================================================================/
==============================================================================
MAX/MIN Statistics for: PPRGA002
------------------------------------------------------------------------------
::::::::::::::
PPRGA002.stats
::::::::::::::
/=====================================================================\
| D A T A F L O W S T A T I S T I C S |
\=====================================================================/
Number of columns in data flow: 21
--------- Aggregate Statistics ----------
Total number of records: 3996
/======================================================================\
| COLUMN | MINIMUM | MAXIMUM | AVERAGE | # FLAGS |
|======================================================================|
|SpETYDOY | 91302| 91302| 91302| 0|
|SpETHour | 22| 23| 22.0238| 0|
|SpETSec | 0| 3599| 2615.94| 0|
|SpETMSec | 27| 994| 494.421| 0|
|RIM | 1.07319e+06| 1.07322e+06| 1.0732e+06| 0|
|MOD91 | 0| 90| 45.1179| 0|
|RightAsc | 75.328| 222.752| 144.653| 0|
|Declin | -18.011| 20.654| 8.80269| 0|
|ConAng | 23.596| 121.626| 43.4466| 0|
|CrsCnAng | 0.04| 359.926| 179.77| 0|
|OpMode | 0| 5| 4.96997| 0|
|FiltrPos | 0| 31| 20.993| 0|
|CLBmSqTg | 0| 0| 0| 0|
|SmpAData | 189| 1536| 1396.48| 0|
|SmpBData | 190| 3709| 1853.19| 0|
|RdomRadi | -7.1| 154.7| 14.4844| 20|
|BrghtTmp | 0| 188.2| 82.4756| 20|
|Intnsity | 1.7e+308| -1.7e+308| NaN| 3996|
|AbsIntns | 1.7e+308| -1.7e+308| NaN| 3996|
|LinerPol | 1.7e+308| -1.7e+308| NaN| 3996|
|PolDirec | 0| 0| 0| 0|
\======================================================================/
==============================================================================
MAX/MIN Statistics for: PPRGA003
------------------------------------------------------------------------------
::::::::::::::
PPRGA003.stats
::::::::::::::
/=====================================================================\
| D A T A F L O W S T A T I S T I C S |
\=====================================================================/
Number of columns in data flow: 21
--------- Aggregate Statistics ----------
Total number of records: 1215
/======================================================================\
| COLUMN | MINIMUM | MAXIMUM | AVERAGE | # FLAGS |
|======================================================================|
|SpETYDOY | 91302| 91302| 91302| 0|
|SpETHour | 23| 23| 23| 0|
|SpETSec | 45| 811| 430.284| 0|
|SpETMSec | 26| 993| 396.795| 0|
|RIM | 1.07322e+06| 1.07323e+06| 1.07322e+06| 0|
|MOD91 | 0| 90| 45.3309| 0|
|RightAsc | 71.869| 76.915| 74.3613| 0|
|Declin | 20.622| 22.297| 21.4685| 0|
|ConAng | 26.344| 30.84| 28.5914| 0|
|CrsCnAng | 0.114| 359.876| 177.765| 0|
|OpMode | 0| 5| 4.93827| 0|
|FiltrPos | 9| 21| 10.144| 0|
|CLBmSqTg | 0| 0| 0| 0|
|SmpAData | 189| 1393| 192.851| 0|
|SmpBData | 190| 2764| 195.078| 0|
|RdomRadi | 1.7e+308| -1.7e+308| NaN| 1215|
|BrghtTmp | 1.7e+308| -1.7e+308| NaN| 1215|
|Intnsity | -0.5| 0| -0.0279866| 18|
|AbsIntns | 0| 0| 0| 18|
|LinerPol | 0| 0| 0| 618|
|PolDirec | 0| 0| 0| 0|
\======================================================================/
==============================================================================
MAX/MIN Statistics for: PPRGA004
------------------------------------------------------------------------------
::::::::::::::
PPRGA004.stats
::::::::::::::
/=====================================================================\
| D A T A F L O W S T A T I S T I C S |
\=====================================================================/
Number of columns in data flow: 21
--------- Aggregate Statistics ----------
Total number of records: 2325
/======================================================================\
| COLUMN | MINIMUM | MAXIMUM | AVERAGE | # FLAGS |
|======================================================================|
|SpETYDOY | 91302| 91303| 91302.1| 0|
|SpETHour | 2| 23| 20.6697| 0|
|SpETSec | 258| 1775| 1191.68| 0|
|SpETMSec | 53| 927| 526.568| 0|
|RIM | 1.07323e+06| 1.0734e+06| 1.07326e+06| 0|
|MOD91 | 0| 90| 44.7677| 0|
|RightAsc | 0.089| 359.675| 259.861| 0|
|Declin | -31.446| 77.888| -10.1039| 0|
|ConAng | 29.312| 153.383| 128.626| 0|
|CrsCnAng | 0.156| 359.973| 187.914| 0|
|OpMode | 5| 5| 5| 0|
|FiltrPos | 21| 21| 21| 0|
|CLBmSqTg | 0| 0| 0| 0|
|SmpAData | 1380| 1613| 1389.16| 0|
|SmpBData | 692| 3657| 1831.51| 0|
|RdomRadi | -9.1| 235.7| 0.57471| 0|
|BrghtTmp | 0| 218.5| 35.2777| 0|
|Intnsity | 1.7e+308| -1.7e+308| NaN| 2325|
|AbsIntns | 1.7e+308| -1.7e+308| NaN| 2325|
|LinerPol | 1.7e+308| -1.7e+308| NaN| 2325|
|PolDirec | 0| 0| 0| 0|
\======================================================================/
==============================================================================
MAX/MIN Statistics for: PPRGA005
------------------------------------------------------------------------------
::::::::::::::
PPRGA005.stats
::::::::::::::
/=====================================================================\
| D A T A F L O W S T A T I S T I C S |
\=====================================================================/
Number of columns in data flow: 21
--------- Aggregate Statistics ----------
Total number of records: 120
/======================================================================\
| COLUMN | MINIMUM | MAXIMUM | AVERAGE | # FLAGS |
|======================================================================|
|SpETYDOY | 91303| 91303| 91303| 0|
|SpETHour | 8| 8| 8| 0|
|SpETSec | 2560| 2758| 2625.73| 0|
|SpETMSec | 304| 971| 637.317| 0|
|RIM | 1.07379e+06| 1.0738e+06| 1.07379e+06| 0|
|MOD91 | 0| 88| 35.675| 0|
|RightAsc | 0| 105.326| 100.441| 0|
|Declin | 0| 23.318| 22.2334| 0|
|ConAng | 0| 0| 0| 0|
|CrsCnAng | 0| 358.313| 187.642| 0|
|OpMode | 4| 4| 4| 0|
|FiltrPos | 18| 24| 21| 0|
|CLBmSqTg | 0| 0| 0| 0|
|SmpAData | 1385| 1488| 1430.65| 0|
|SmpBData | 798| 3712| 1870.19| 0|
|RdomRadi | -4| 234.5| 71.035| 0|
|BrghtTmp | 0| 146.9| 113.928| 0|
|Intnsity | 1.7e+308| -1.7e+308| NaN| 120|
|AbsIntns | 1.7e+308| -1.7e+308| NaN| 120|
|LinerPol | 1.7e+308| -1.7e+308| NaN| 120|
|PolDirec | 0| 0| 0| 0|
\======================================================================/