PDS_VERSION_ID = PDS3
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Volume GOPOS_9001
Galileo Orbiter at Jupiter
SC Traj. Jup.-Centered Coords. Data
Planetary Plasma Interactions Discipline Node
of the
Planetary Data System
==============================================================================
Brief Volume Description
==============================================================================
This data set contains the Galileo spacecraft trajectory data in three
coordinate systems commonly used in the analysis of jovian
magnetospheric data. These include System III (1965.0), Jupiter Solar
Equatorial (JSE), and Jupiter Solar Magnetospheric (JSM) coordinates.
The data are sampled every minute inside of 30 Jupiter radii, every ten
minutes between 30 and 100 Rj, and every 30 minutes outside of 100 Rj.
The data are derived from SPICE SP kernels which are archived at the
NAIF Node of the PDS.
All data files are stored in the 'DATA' branch of the directory tree. Each
instrument is given a subdirectory and each data set is located in a
subdirectory beneath that. Most data are stored in ASCII tables although
some binary data are also included. All files give time values in Spacecraft
Event Time (SCET). Some files may give an additional time column that
contains the Earth Received Time (ERT) in addition to the SCET.
Users of these data are encouraged to acknowledge both the PDS and the
principal investigators of the instruments whose data is used in analysis
in all publications.
==============================================================================
Volume Set Information
==============================================================================
This volume is part of the Galileo Magnetospheric Working Group Jupiter
Science Data volume set. This volume set includes the following volumes:
* GODDS_9001 - Galileo Oribiter Dust Detection System Data Set
* GOEPD_9001 - Galileo Orbiter at Jupiter EPD High-Res. Sectored Data Set
* GOEPD_9002 - Galileo Orbiter at Jupiter EPD Scan Averages Data Set
* GOHIC_9001 - Galileo Orbiter at Jupiter HIC High-Res. Energetic Ion
Countrates Data Set
* GOHIC_9002 - Galileo Orbiter at Jupiter HIC Real-time Science (Low Rate)
Energetic Ion Countrates Data Set
* GOHIC_9003 - Galileo Orbiter at Jupiter HIC Ion Flux Composition Data Set
* GOMAG_9001 - Galileo Orbiter at Jupiter MAG High-Res. Magnetic-Field Data
Set
* GOMAG_9002 - Galielo Orbiter at Jupiter MAG Survey (Low Rate) Magnetic-
Field Data Set
* GOPLS_9001 - Galileo Orbiter at Jupiter PLS Full-Res. Raw Data Set
* GOPLS_9002 - Galileo Orbiter at Jupiter PLS Spin Averaged Countrates Data
Set
* GOPOS_9001 - Galileo Orbiter at Jupiter Spacecraft Trajectory in Jupiter-
Centered Coordinates Data Set
* GOPOS_9002 - Galileo Orbiter at Jupiter Spacecraft Trajectory in Jovian
Moon-Centered Coordinates Data Set
* GOPOS_9003 - Galileo Orbiter at Jupiter Jovian Moon Trajectories in
Jupiter-Centered Coordinates Data Set
* GOPOS_9004 - Galileo Orbiter at Jupiter Rotor Attitude Data Set
* GOPWS_9001 - Galileo Orbiter at Jupiter PWS 1 Min. Averaged Electric &
Magnetic Wave Spectra Data Set
* GOPWS_9002 - Galileo Orbiter at Jupiter PWS Full-Res. Electric & Magnetic
Wave Spectra Data Set
* GOPWS_9003 - Galileo Orbiter at Jupiter PWS Full-Res. (RTS Mode) Electric
& Magnetic Wave Spectra Data Set
* GOPWS_9004 - Galileo Orbiter at Jupiter PWS 1 kHz Wideband Waveform Data
Set
* GOPWS_9005 - Galileo Orbiter at Jupiter PWS 10 kHz Wideband Waveform Data
Set
* GOPWS_9006 - Galileo Orbiter at Jupiter PWS 80 kHz Wideband Waveform Data
Set
* GORSS_9001 - Galileo Orbiter Jupiter and Io RSS Radio Occulation
Ionospheric Electron Density Profiles Data Set
* GOSSD_9001 - Galileo Orbiter at Jupiter SSD Derived Electron Flux Data
Set
==============================================================================
Mission Facts
==============================================================================
The Galileo spacecraft and some science instruments were reprogrammed after
arrival at Jupiter so that data acquisition and downlink could be achieved
at the low bit rates associated with the mission after the high gain antenna
(HGA) anomaly (see GO_INST_HOST.CAT file in the CATALOG
directory). New software was telemetered to the spacecraft in early May 1996
in a period known as the 'Inflight Load' or IFL. The mission prior to the IFL
is known as the Phase 1 mission. After the IFL the mission is referred to as
the Phase 2 mission. In Phase 1 raw data were provided to the instrument
teams in Experiment Data Record (EDR) format. In Phase 2, the whole
telemetry stream and ground data system were changed. The raw data were
'packetized' and delivered electronically as packet files or instrument
packet files (IPF). The difference between a packet file and an IPF is a
single 44 byte header called an SFDU. The Io data stored on this volume were
acquired during Phase 1 and downlinked after the IFL by use of the new
capabilities of the Phase 2 flight software. As such, they are a hybrid form
of data that were acquired by using flight software that may differ from
other files of the same raw data format. This is primarily of concern when
instrument reprogramming has resulted in a change in the contents of the raw
data (i.e. MAG).
The Galileo orbits were named by concatenating the first letter of the name
of the primary target in each orbit with the orbit number. Thus, the fourth
Jupiter orbit, in which Europa is the primary target, is called E4. The
project defined orbits according to spacecraft command load boundaries rather
than the normal convention of apoapsis to apoapsis. The navigation team did
not always adhere to this convention, causing some confusion. The PDS has
organized the data and data delivery schedules around the project defined
orbit boundaries. The following tables contain information about the orbital
tour and satellite encounters:
---------------------------------------------------------------------
Galileo Orbit Information
---------------------------------------------------------------------
Orbit Orbit ❮--- Periapsis Info ----❯ ❮-- Apoapsis Info --❯
Num Start Periapsis Range Local Apoapsis Range Local
Date Date/Time ❮Rj**❯ Time Date ❮Rj❯ Time
---------------------------------------------------------------------
J0 95-12-03 95-12-07 21:54 4.00 16:21 96-03-29 267.7 03:39
G1 96-06-23 96-06-28 00:31 11.03 15:36 96-08-09 125.3 03:24
G2 96-09-01 96-09-07 13:38 10.65 15:22 96-10-07 113.0 03:12
C3 96-11-02 96-11-06 13:31 9.21 15:34 96-11-27 89.1 03:28
E4 96-12-15 96-12-19 03:22 9.16 15:21 97-01-04 72.1 03:00
J5* 97-01-15 97-01-20 00:26 9.05 14:54 97-02-04 72.1 02:48
E6 97-02-16 97-02-20 20:55 9.12 14:28 97-03-14 89.2 02:20
G7 97-03-30 97-04-04 11:03 9.12 14:14 97-04-21 75.9 01:56
G8 97-05-04 97-05-08 11:42 9.27 13:29 97-06-02 100.2 01:21
C9 97-06-22 97-06-27 11:52 10.77 12:35 97-08-08 143.0 00:21
C10 97-09-14 97-09-18 23:10 9.17 12:44 97-10-13 98.9 00:36
E11 97-11-02 97-11-06 23:02 9.03 12:36 97-11-26 84.1 00:29
E12 97-12-15 97-12-16 06:35 8.80 12:29 97-12-20 46.6 00:37
J13* 98-02-09 98-02-10 23:09 8.85 12:33 98-03-06 95.2 00:25
E14 98-03-28 98-03-29 07:59 8.83 12:17 98-04-30 199.7 00:16
E15 98-05-30 98-06-01 02:34 8.85 12:12 98-06-26 100.4 00:03
E16 98-07-20 98-07-20 17:18 9.93 11:54 98-08-23 124.4 23:51
E17 98-09-25 98-09-26 08:26 8.91 11:44 98-10-24 110.4 23:34
E18 98-11-21 98-11-22 03:57 9.23 11:24 98-12-27 129.0 23:17
E19 99-01-31 99-02-01 02:38 9.24 10:56 99-03-18 154.3 22:40
C20 99-05-02 99-05-03 17:00 9.37 10:24 99-06-02 114.5 21:46
C21 99-06-29 99-07-02 05:04 7.27 10:04 99-07-22 89.0 21:57
C22 99-08-11 99-08-12 10:58 7.32 09:50 99-08-29 77.1 21:23
C23 99-09-13 99-09-14 19:57 6.55 09:17 99-09-27 65.7 20:46
I24 99-10-10 99-10-11 03:31 5.68 08:41 99-11-01 97.7 20:47
I25 99-11-25 99-11-26 23:30 5.94 08:39 99-12-15 87.2 20:28
E26 00-01-01 00-01-04 03:33 5.78 08:14 00-01-28 102.7 20:05
I27 00-02-20 00-02-22 12:30 5.85 07:56 00-04-06 154.4 19:55
G28 00-05-17 00-05-21 04:52 6.68 07:18 00-09-08 289.9 18:37
G29 00-12-27 00-12-29 03:26 7.49 06:03 01-03-11 216.3 17:37
C30 01-05-07 01-05-23 17:33 7.28 05:11 01-06-29 136.8 16:27
I31 01-08-04 01-08-06 04:52 5.93 04:14 01-09-10 132.2 16:05
I32 01-10-14 01-10-15 23:56 5.78 03:53 01-12-01 160.7 15:39
I33 02-01-16 02-01-17 16:23 5.54 03:13 02-06-13 348.1 14:21
A34 02-11-04 02-11-05 07:23 1.99 01:40 03-04-14 336.7 12:49
J35 03-09-21 03-09-21 18: 1.00
* Solar Conjunction - no data from this orbit
** Rj = 71492 km
------------------------------------------------------------
Satellite Flyby Characteristics*
------------------------------------------------------------
Satellite Planetocentric Coords
Range Lat E Lon
Orb Moon C/A Time (Rm**) (deg) (deg) Note
------------------------------------------------------------
0 IO 95-12-07 17:45:58 1.50 -9.6 258.9 W
24 IO 99-10-11 04:33:03 1.34 4.5 135.9 U
27 IO 00-02-22 13:46:41 1.11 18.5 157.4 U
31 IO 01-08-06 04:59:21 1.11 77.5 187.7 P
32 IO 01-10-16 01:23:21 1.10 -78.5 135.3 P
33 IO 02-01-17 14:08:28 1.06 -43.5 41.8 F
4 EUR 96-12-19 06:52:58 1.45 -1.7 322.4 F
6 EUR 97-02-20 17:06:10 1.38 -17.0 34.7 F
11 EUR 97-11-06 20:31:44 2.31 25.7 218.7 F
12 EUR 97-12-16 12:03:20 1.13 -8.7 134.4 U
14 EUR 98-03-29 13:21:05 2.06 12.2 131.2 U
15 EUR 98-05-31 21:12:57 2.62 15.0 225.4 W
19 EUR 99-02-01 02:19:50 1.93 30.5 28.1 U
26 EUR 00-01-03 17:59:43 1.22 -47.1 83.4 U
1 GAN 96-06-27 06:29:07 1.32 30.4 246.7 W
2 GAN 96-09-06 18:59:34 1.10 79.3 236.4 P
7 GAN 97-04-05 07:09:58 2.18 55.8 270.4 W
8 GAN 97-05-07 15:56:10 1.61 28.3 84.8 U
28 GAN 00-05-20 10:10:10 1.31 -19.0 92.4 U
29 GAN 00-12-28 08:25:27 1.89 62.2 269.0 P
3 CALL 96-11-04 13:34:28 1.47 13.2 282.3 W
9 CALL 97-06-25 13:47:50 1.17 2.0 101.0 U
10 CALL 97-09-17 00:18:55 1.22 4.6 281.3 W
30 CALL 01-05-25 11:23:58 1.06 13.6 254.6 W
34 AMA 02-11-05 06:18:40 2.89 -47.7 74.8 U
* Satellite encounters with recorded data only
J2000 reference, body fixed spherical coordinates.
** Moon Rm (km)
=======================
Amalthea 86.2
Io 1818
Europa 1560
Ganymede 2634
Callisto 2409
Notes: Negative latitudes are southern hemisphere,
U = upstream
F = flank
W = wake
P = polar
==============================================================================
Volume Format Information
==============================================================================
The volume is organized into a hierarchical directory structure. It complies
with both the Universal Disk Format (UDF) and the ISO 9660 (level 2) file
system standards in order to accommodate users on a wide variety of
platforms.
==============================================================================
File Formats
==============================================================================
The data files on this volume are a mix of ASCII text and binary
files. All data files are described by detached PDS labels. A
detached label file has the same name as the data file that it
describes, but with the extension LBL. For example, the file
ATTITUDE.TAB is accompanied by the detached label file ATTITUDE.LBL in
the same directory.
All data files on this volume are described by detached PDS labels (.LBL).
When there are multiple data files with the same structure in a single
directory, the format portion of the PDS label is further detached into
a format file (.FMT). In general, there is a brief description of each
data set collocated with the data files in a file called INFO.TXT.
Documentation formatted for inclusion in the PDS catalog can be found in
the CATALOG directory. Additional documentation is generally located in the
DOCUMENT directory. In particular, all of the Space Science
Reviews (SSR) instrument papers can be found in subdirectories of the
DOCUMENT directory. The documents are reprinted by permission of Kluwer
Academic Publishers, Dordrecht, Boston, London.
All document, detached PDS labels, and HTML files are stream
format files, with a carriage return (ASCII 13) and a line feed
character (ASCII 10) at the end of the record. This allows the files
to be read by MacOS, DOS, Windows, Unix, and VMS operating systems.
Unix system and Macintosh users will see the unnecessary carriage
return character (^M) at the end of each line. Mac users will see an
unnecessary line feed (^J) character at the start of each line.
ASCII tabular data files (*.TAB) are formatted so that they may be
read directly into many database management systems (DBMS) or
spreadsheet programs on various computers. All fields are of fixed
length and are separated by white space (blank characters or commas).
Character fields are left justified, and numeric fields are
right justified. The 'start byte' and 'bytes' values listed in a PDS
label do not include the white space between fields. The records are
of fixed length, and the last two bytes of each record contain the
ASCII carriage return and line feed characters. This allows a table
to be treated as a fixed length record file on computers that support
this file type and as a normal text file on other computers.
The document, PDS label, and ASCII table files on this volume can
be viewed with a Web browser. Note that to view these files, the
browser may need to be configured to recognize files with extensions
of .LBL, .TAB, and .CAT as text files.
PDS labels are object-oriented. The object to which the label
refers (e.g., TIME_SERIES, TABLE, etc.) is denoted by a statement of
the form:
^object = location
in which the caret character (^, also called a pointer in this
context) indicates that the object starts at the given location. For
an object in the same file as the label, the location is an integer
representing the starting record number or byte of the object (the first
record/byte in the file is 1). For an object located outside the
label file, the location denotes the name of the file containing the
object, along with the starting record or byte number. For example:
^TIME_SERIES = ("20903684.DAT", 3)
indicates that the TIME_SERIES object begins at record 3 of the file
20903684.DAT, in the same directory as the detached label file. Below
is a list of the possible formats that use the ^object keyword.
^object = n
^object = n❮BYTES❯
^object = ("filename.ext",n)
^object = ("[dirlist]filename.ext",n)
^object = ("filename.ext",n❮BYTES❯)
^object = ("[dirlist]filename.ext",n❮BYTES❯)
where n is the starting record or byte number of the object,
counting from beginning of the file (record 1,
byte 1); default is record number.
❮BYTES❯ indicates that number given is in units of bytes.
filename upper-case file name.
ext upper-case file extension.
dirlist* period-delimited path-list of parent directories,
in upper case, that specifies the object file
directory (used only when the object is not in the
same directory as the label file).
* All PDS labels on this volume are located in the same directory as
the file they describe so this construct is not used here.
In cases where many files of the same format or structure are present,
the structure description component is detached from the primary label.
This minimizes repeating information which is not varying from file to
file. In these cases, a format file (.FMT) contains the file structure
information and the base label (.LBL) describes the parameters which
generally do vary from file to file
(# of records, file name, start/stop time, etc.). When a format file
is used within the PDS label the syntax is:
^STRUCTURE = filename
Example:
^STRUCTURE = 'EDRHDR.FMT'
Syntactically, the contents of the format file can be inserted directly
into the base label such that the entire file contents replace the single
line ^STRUCTURE = filename.
Data set descriptions, instrument descriptions, and other useful documents
are in .CAT files in the /CATALOG directory. In more recent versions of the
Microsoft Windows operating system the .CAT by default is reserved as
'Security Catalog.' The .CAT files contained in this volume are ASCII text
files, and can be read by any form of text editor. To make Windows open
files with this name extension as text files, do the following. In Windows
Explorer, open the 'Tools' menu and select 'Folder Options'. Select the
'File Types' tab and select 'CAT' from the list. Press 'Change...' and then
choose your prefered text editor or viewer. We do not know of any harmful
effects this might have on the operating system or other programs, but do not
guarantee it will be entirely safe to make this change. If problems occur,
the change can be undone in the same 'File Types' window by changing the
default application back to 'crypto shell extension'. Copies of these
documents can be found in the /EXTRAS/CATALOG_FILES directory with '.TXT'
extensions, for easier access.
============================================================================
Software
============================================================================
There are no software provided on this volume.
==============================================================================
Volume Contents and Structure
==============================================================================
This section describes the volume structure and naming conventions. Below is
a tree diagram of the volume, followed by a description of the directory
function and key files in each directory.
GOPOS_9001 (root directory)
|
|- AAREADME.TXT Describes volume contents, organization and CD-ROM use
| (this file)
|
|- ERRATA.TXT Describes known deficiencies or caveats in the data or
| on this volume.
|
|- VOLDESC.CAT High level description of volume contents.
|
|
|- [BROWSE] Trajectory browse plots.
| |
| |- [SURVEY] Orbit plots
|
|- [CATALOG] Information on data sets and how they are processed and
| produced. Also contains information regarding Galileo
| orbiter, the instruments covered by this volume, personnel
| involved, and references from various documents
| including those contained in the /CATALOG and /DOCUMENT
| directories.
|
|- [DATA]
| |
| |- [SURVEY] low resolution data (as low as 30-minute)
|
|
|- [DOCUMENT]
| |
| |- [PROJECT] Galileo project documentation describing raw telemetry
| | data files, formats, etc.
| |
| |- [AR_SEF] As-Run Spacecraft event files (SEF) provided
| | in separate subdirectories for each orbit
| |
| |- [GLL3_180] contains a project document describing the
| | Galileo spacecraft and the configuration of
| | instruments on-board
| |
| |- [GLL3_280] Text and Adobe PDF format versions of
| | the Galileo Phase 1 and 2 documents describing
| | EDR data formats
| |
| |- [GLL3_310] Text (useless) and Adobe PDF format
| | versions of Galileo ground system processing
| | and packet file creation and formats.
| |
| |- [GLL3_640] Text and HTML (with GIF images of figures)
| | format versions of the pages from the document
| | that describes the headers in the Phase 1 EDR
| | raw data files.
| |
| |- [SEF_SIS] Text and Adobe PDF format versions of
| | the SIS describing the SEF command files.
| |
| |- [SFDU_DOC] Text and HTML format versions of a
| particularly useful document put together by
| Betsy Wilson describing the various SFDU
| headers and packet types possible in the
| Phase 2 raw packetized data files.
|
|- [INDEX] Contains a table of contents for all files located on this
volume
==============================================================================
Errata
==============================================================================
Every effort has been made to assure that the data and documentation are of
the best possible quality. However, mistakes are inevitable. The PPI Node
of the PDS will maintain an online list of ERRATA where errors and updates
are documented. Should any user of this product find an error on this
volume, please report the error to the PPI Node so that the finding can
be made public. All users are encouraged to verify the correctness of the
data prior to submitting any publications or other work based on these data.
There is a file called ERRATA.TXT found at the root level of this volume
which contains a list of known deficiencies or caveats associated with data
on this volume at the time that it was produced.
If you find an error on this volume, please report it to the PDS Operator at
the PPI Node of the PDS (contact information below).
============================================================================
Contacts
============================================================================
The person most directly responsible for the construction and release of
this volume is Mr. Steven Joy. He was the PPI Node Data Administrator at the
time this volume was created and understands as much about the volume
structure and data organization as anyone. Other PPI personnel who may be
aware of about issues related to this volume include Joe Mafi, Bill Harris,
and Dr. Raymond Walker, the PDS/PPI Node manager.
For questions or problems regarding this archive, please contact the PDS/PPI
PDS operator:
Email pds_operator@igpp.ucla.edu
Telephone (310) 206-6073
U.S. Mail PDS Operator
c/o Dr. Raymond Walker
3845 Slichter Hall
UCLA - IGPP
Los Angeles, CA 90095-1567
For questions regarding PDS Standards or other archives available from the
PDS, please contact PDS Operator at the PDS Central Node (at JPL):
Email pds_operator@jpl.nasa.gov
Telephone (818) 354-4321
U.S. Mail Planetary Data System, PDS Operator
Jet Propulsion Laboratory
Mail Stop 202-101
4800 Oak Grove Dr.
Pasadena, CA 91109-8099
The PDS and the Planetary Plasma Interactions (PPI) Node in particular,
assume no legal liability for errors on this volume. All users are
encouraged to verify the correctness of the data prior to submitting any
publications or other work based on these data. Errors on this volume should
be reported back to the PPI Node of the PDS through the ERRATA reporting
procedures described above.
|