SEDR2ASC User's Guide
*** NOTE:
VAX-VMS users can find available software from
UCLASP::DISK$SCRATCH:[PDSUSER.SOFTWARE].
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General Info:
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The SEDR2ASC program is used to extract data from the PDS Archive CD-ROM's
containing the Pioneer Venus Orbiter (PVO) Supplemental Experimenter Data
Record (SEDR) dataset. The program is written in the C programming language
and will compile using either the Gnu C Compiler (2.3) with the
"-traditional" option or the VAX C compiler version 3.1.
The original PVO SEDR tapes contained 6 files per orbit (logical header,
pulse time, spin period, selected roll reference, attitude, and ephemeris).
This program can extract any of these files and either display the data to
the screen or output data to an ASCII file on the local system. In addition
to the basic 6 files, this program can extract data identical to the
ephemeris dataset submitted by the Magnetometer instrument team or it can
output the matrix which rotates from Inertial Spacecraft
Coordinates to Venus Solar Orbital coordinates. Please see the coordinate
system description text on the CD-ROM for definitions of these coordinate
systems.
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Before Getting Started:
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In order for this program to run under VMS, the user must define the path to
the program before attempting to run the software. If the code is located at
DISK$USER:[MYNAME.MYPROGRAMS]SEDR2ASC.EXE
then the user must define that path by giving the command
SEDR2ASC :== $DISK$USER:[MYNAME.MYPROGRAMS]SEDR2ASC.EXE
If the software has been installed using the "INSTALL" program provided and
the user selected the modify login.com option, then this becomes an
unnecessary operation (but it won't mess things up either!)
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Usage and Examples:
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The program is command-line driven. All options to the program are given
at run-time in the same command that executes the program. All options, except
colfile, are required!!!
Usage:
SEDR2ASC [INFILE=AAA] [OUTFILE=BBB] [HOST=CCC] [FILETYPE=DDD] (COLFILE=EEEEE)
Options:
INFILE: The complete name including path to the input data file.
OUTFILE: The name of the output file or "-" for output-to-screen.
HOST: The type of host system you are working on.
VALID: VAX, SUN, IBM, HP, MSB (MicroSoft DOS), PC (IBM DOS)
FILETYPE: The type of input file.
VALID: PULSE, SPIN, EPHEM, LOGISTIC, SEL_ROLL, ATTITUDE,
MAG_EPHEM, SC2VSO_MAT
COLFILE: An ASCII file containing a list of column (numbers) to be
extracted from the "ephemeris" dataset. This file contains
1 column number per line.
Examples:
For all usage examples, we will assume a VAX/VMS computer with a
CD-ROM reader called "MYSYS$DUA1:". The user should have the CD-ROM
already mounted.
VMS Mount Commands for various versions of VMS:
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Driver VMS vn Commands
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VFS010 4.7 MOUNT/STRUCTURE=ISO_9660/OVER=ID MYSYS$DUA1:
VFS020 5.2 MOUNT/STRUCTURE=ISO_9660/OVER=ID MYSYS$DUA1:
VFS022 5.4 CDMOUNT/STRUCTURE=ISO_9660/OVER=ID MYSYS$DUA1:
DISMOUNT: DISMOUNT MYSYS$DUA1:
F11CD055 5.5 CD_MOUNT/OVER=ID MYSYS$DUA1:
DISMOUNT: CD_DISMOUNT MYSYS$DUA1:
ISO support will be bundled with VMS in version 6.0.
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Example 1:
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Extract an ephemeris data file for orbit 291 to the file "mydata.asc"
SEDR2ASC INFILE=MYSYS$DUA1:[DATA.EPHEM.ORB0201]EP0291.DAT OUTFILE=MYDATA.ASC
HOST=VAX FILETYPE=EPHEM
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Example 2:
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Extract the list of columns specified in the file "ephem_cols.asc" from
the ephemeris data file for orbit 291 to the file "mydata.asc"
SEDR2ASC INFILE=MYSYS$DUA1:[DATA.EPHEM.ORB0201]EP0291.DAT OUTFILE=MYDATA.ASC
HOST=VAX FILETYPE=EPHEM COLFILE=EPHEM_COLS.ASC
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Example 3:
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Extract a spin period data file for orbit 363 to the screen
SEDR2ASC OUTFILE=- HOST=VAX FILETYPE=SPIN
INFILE=MYSYS$DUA1:[DATA.SPIN.ORB0301]SP0363.DAT
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Example 4:
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Extract a spacecraft attitude data file for orbit 341 to the screen
SEDR2ASC FILETYPE=ATTITUDE INFILE=MYSYS$DUA1:[DATA.ATTITUDE.ORB0301]AT0341.DAT
OUTFILE=- HOST=VAX
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Example 5:
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Extract a pulse time data file for orbit 241 to the an ASCII file
SEDR2ASC FILETYPE=PULSE INFILE=MYSYS$DUA1:[DATA.PULSE.ORB0201]PT0241.DAT
HOST=VAX OUTFILE=MYDATA.ASC
As you can see the order in which options are given is not important. The
software only requires that all options be fully specified. It is also
clear that the path to the input file is tiresome to type each time.
The user can get around this problem by defining a logical name to the
path: Here is the syntax:
$ ASSIGN MYSYS$DUA1:[DATA.] CDROM
which allows user to simply access any directory beneath [DATA] or
$ ASSIGN MYSYS$DUA1:[DATA.SPIN.ORB0301] SP301
which provides a shorter path that can only access spin period files from
orbit 301-400.
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Example 6:
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Repeat example 2 using the first new logical name we have created
SEDR2ASC INFILE=CDROM:[SPIN.ORB0301]SP0363.DAT OUTFILE=- HOST=VAX FILETYPE=SPIN
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Example 7:
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Repeat example 2 using the second new logical name we have created
SEDR2ASC INFILE=SP301:SP0363.DAT OUTFILE=- HOST=VAX FILETYPE=SPIN
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Example 8:
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Create a command procedure to extract 10 orbits of selected ephemeris data
columns to the directory DISK$USER:[MYNAME.MYDATA.PVO_EPHEM], beginning with
mounting the CD-ROM for VMS version 5.5 at the location MYSYS$DUA1:
$!--------------------------------------------------------------
$! BEGIN: EPEXTRACT.COM
$!--------------------------------------------------------------
$!
$! CHANGE DIRECTORY TO THE OUTPUT AREA
$!
$ SET DEFAULT DISK$USER:[MYNAME.MYDATA.PVO_EPHEM]
$!
$! MOUNT CD AND DEFINE REQUIRED LOGICALS
$!
$ CD_MOUNT/OVER=ID MYSYS$DUA1:
$ SEDR2ASC :== $DISK$USER:[MYNAME.MYPROGRAMS]SEDR2ASC.EXE
$ ASSIGN MYSYS$DUA1:[DATA.EPHEM.ORB0101] EPDATA
$!
$! GET 10 ORBITS OF EPHEMERIS DATA
$!
$ SEDR2ASC INFILE=EPDATA:EP0113.DAT OUTFILE=EP113.ASC HOST=VAX FILETYPE=EPHEM -
COLFILE=EPHEM_COLS.ASC
$ SEDR2ASC INFILE=EPDATA:EP0114.DAT OUTFILE=EP114.ASC HOST=VAX FILETYPE=EPHEM -
COLFILE=EPHEM_COLS.ASC
$ SEDR2ASC INFILE=EPDATA:EP0115.DAT OUTFILE=EP115.ASC HOST=VAX FILETYPE=EPHEM -
COLFILE=EPHEM_COLS.ASC
$ SEDR2ASC INFILE=EPDATA:EP0116.DAT OUTFILE=EP116.ASC HOST=VAX FILETYPE=EPHEM -
COLFILE=EPHEM_COLS.ASC
$ SEDR2ASC INFILE=EPDATA:EP0117.DAT OUTFILE=EP117.ASC HOST=VAX FILETYPE=EPHEM -
COLFILE=EPHEM_COLS.ASC
$ SEDR2ASC INFILE=EPDATA:EP0118.DAT OUTFILE=EP118.ASC HOST=VAX FILETYPE=EPHEM -
COLFILE=EPHEM_COLS.ASC
$ SEDR2ASC INFILE=EPDATA:EP0119.DAT OUTFILE=EP119.ASC HOST=VAX FILETYPE=EPHEM -
COLFILE=EPHEM_COLS.ASC
$ SEDR2ASC INFILE=EPDATA:EP0120.DAT OUTFILE=EP120.ASC HOST=VAX FILETYPE=EPHEM -
COLFILE=EPHEM_COLS.ASC
$ SEDR2ASC INFILE=EPDATA:EP0121.DAT OUTFILE=EP121.ASC HOST=VAX FILETYPE=EPHEM -
COLFILE=EPHEM_COLS.ASC
$ SEDR2ASC INFILE=EPDATA:EP0122.DAT OUTFILE=EP122.ASC HOST=VAX FILETYPE=EPHEM -
COLFILE=EPHEM_COLS.ASC
$!
$! UNMOUNT THE CD-READER
$!
$ CD_DISMOUNT MYSYS$DUA1:
$!
$! ALL DONE - EXIT
$!
$ EXIT
$!-------------------------------------------------------------------------
$! END: EPEXTRACT.COM
$!--------------------------------------------------------------