Sun Banner

Ulysses HISCALE Data Analysis Handbook


Appendix 7. LAN EDR Interface Specification


A7.8 Magnetic Tape Label Specifications


NOTE: The BAM, GLG, HED, KEP, LAN and SIM experiments have requested that no magnetic labels be written onto their EDR tapes. For these experiments, the following specifications will not apply. Instead, their non-labeled EDR tapes will begin with the first data record and end with two consecutive end-of-file (EOF) marks.


A7.8.1 Structure and Organization Overview


Each individual experiment EDR tape shall consist of an IBM magnetic label consisting of a Standard Volume Label (VOL1) and two Standard Data Set Labels (HDR1 and HDR2) followed by a tape mark. Following the tape label is the data file containing instrument science records. At the end of the data file there shall be a tape mark followed by a trailer label. The trailer label shall be followed by a single tape mark if data is to follow onto an additional reel of tape or a double tape mark if this is the last tape produced. Refer to Figure A7-6 for an EDR data tape recorded on multiple tape volumes. It is not expected that any ULS EDR products will require multiple tape volumes.


Figure A7-6 EDR File Structure


Figure A7.6



A7.8.2 Magnetic Label Substructure Definition


The magnetic label consists of three physical records which are:

1) the standard volume label (VOL1),
2) the standard data set label (HDR1), and
3) a second standard data set label (HDR2).


VOL1 Definition


The VOL1 record contains 80 EBCDIC characters for a total of 20 32-bit words. The VOL1 record gives information on the tape number according to Table A7-7.

Table A7-7 VOL1 label contents


Table A7-7


HDR1 Definition


The HDR1 record contains 80 EBCDIC characters for a total of 20 32-bit words. The HDR1 record gives information on data set name, tape number of first volume in series of volume(s), tape creation date, and block count according to Table A7-8.


Table A7-8 HDR1, EOV1, EOF1 label contents


HDR1 1-4 Label Identifier Will be HDR1 or EOV1 or EOF1
EOF1 5-21 File Identifier Data set name with rightmost 17 bytes right justified
  22-27 File Serial # Serial number of first volume
  28-31 Volume Sequence # Will be a number (0001-9999)
  32-35 File Sequence # Will be 0001
  36-39 Generation Number Will be 0001
  40-41 Version Number Will be 00
  42-47 Creation Date A blank followed by 2 char. for the year (00-99) followed by 3 char. for the day (001-366)
  48-53 Expiration Date Same format as creation date
  54 Accessibility Will be zero
  55-60 Block Count Will be zero if header label or block count if trailer label
  61-73 System Code May be null (binary zero)
  74-80 Reserved Will be blanks


HDR2 Definition


The HDR2 record contains 80 EBCDIC characters for a total of 20 32-bit words. The HDR2 record gives record format, block length, record length, tape density, and related information according to Table A7-9.


Table A7-9 HDR2, EOV2, EOF2 label contents


HDR2 1-4 Label Identifier Will be HDR2 or EOV2 or EOF2
EOF2 5 Record Format Will be U (unblocked records)
  6-10 Block Length Will be max. block length
  11-15 Record Length Will be max. record length
  16 Tape Density Will be tape density code
  17 Multi-vol. Switch A code indicating a vol. switch
  18-34 Job/Job Step Ident. 8 character job name/8 character step name
  35-36 Not Used Will be blanks
  37 Control Character Will be blank
  38 Reserved Will be blank
  39 Block Attributes A code indicating blocking attributes
  40-80 Reserved Will be blanks



A7.8.3 Science Data File Definition


The science data file consists of experiment data as well as spacecraft engineering and spin phase. These records shall each contain a standard SFDU header and a data block. The header is described in Sections A7.1 and A7.2 while the data block formats are described in Sections A7.3 and A7.4.


A7.8.4 Trailer Label Definition


The trailer label consists of either

1) a pair of end of volume labels (EOV1 and EOV2) or
2) a pair of end of file labels (EOF1 and EOF2).

The EOV1 and EOV2 labels are used in the case where a data set cannot be completed on the current tape and must continue on an additional reel of tape; the EOF1 and EOF2 are used in the case where a data set completes on the current tape, whether the first tape or nth tape created. The formats of EOV1 and EOF1 are indicated in Table A7-8; the formats of EOV2 and EOF2 are indicated in Table A7-9.



Next: A7.9 Physical Tape Label Specifications


Return to Appendix 7 Table of Contents

Return to HISCALE List of Appendices

Return to Ulysses HISCALE Data Analysis Handbook Table of Contents


Updated 8/8/19, Cameron Crane


Manufacturer: ESA provided the Ulysses spacecraft, NASA provided the power supply, and various others provided its instruments.

Mission End Date: June 30, 2009

Destination: The inner heliosphere of the sun away from the ecliptic plane

Orbit:  Elliptical orbit transversing the polar regions of the sun outside of the ecliptic plane