Fixed_Header

xml record "Fixed_Header"
Earth Explorer Fixed Header

idfield namedefinition
0File_Name
xml string
The Logical File Name, i.e. the File Name excluding the extension
1File_Description
xml string
A 1-line description of the File Type
2Notes
xml string
Multi-lines free text. This can be used for any type of comment, relevant to that instance of the file.
3Mission
xml string
A 1-word description of the Mission, coherent with the Mission element in the File Name.
4File_Class
xml string
A 1-line description of the file class, coherent with the File Class element in the File Name.
5File_Type
xml string
6Validity_Period
xml record
idfield namedefinition
0Validity_Start
ascii timesize: 23
This is the UTC Validity Start Time, coherent with the Validity Start Time in the File Name, but in CCSDS ASCII format with time reference. Note that this can have the special value indicating "beginning of mission" (without an absolute time specified)

unit: "s since 2000-01-01"

value: if(str(., 23) == "UTC=9999-99-99T99:99:99", +inf, if(str(., 23) == "UTC=9999-12-31T23:59:59", +inf, if(str(., 23) == "UTC=0000-00-00T00:00:00", -inf, time(str(.), "'UTC='yyyy-MM-dd'T'HH:mm:ss|'TAI='yyyy-MM-dd'T'HH:mm:ss|'GPS='yyyy-MM-dd'T'HH:mm:ss|'UT1='yyyy-MM-dd'T'HH:mm:ss"))))
ascii stringsize: 23
CCSDS ASCII datetime with time reference "RRR=YYYY-MM-DDThh:mm:ss". The reference RRR can be any of "UT1", "UTC", "TAI", or "GPS".
1Validity_Stop
ascii timesize: 23
This is the UTC Validity Stop Time, coherent with the Validity Stop Time in the File Name, but in CCSDS ASCII format with time reference. Note that this can have the special value indicating "end of mission" (without an absolute time specified)

unit: "s since 2000-01-01"

value: if(str(., 23) == "UTC=9999-99-99T99:99:99", +inf, if(str(., 23) == "UTC=9999-12-31T23:59:59", +inf, if(str(., 23) == "UTC=0000-00-00T00:00:00", -inf, time(str(.), "'UTC='yyyy-MM-dd'T'HH:mm:ss|'TAI='yyyy-MM-dd'T'HH:mm:ss|'GPS='yyyy-MM-dd'T'HH:mm:ss|'UT1='yyyy-MM-dd'T'HH:mm:ss"))))
ascii stringsize: 23
CCSDS ASCII datetime with time reference "RRR=YYYY-MM-DDThh:mm:ss". The reference RRR can be any of "UT1", "UTC", "TAI", or "GPS".
7File_Version
ascii uint16size: 4
A repetition of the File Version element in the File Name.
8Source
xml record
idfield namedefinition
0System
xml string
Name of the Ground Segment element creating the file (e.g. FOS, PDS, SSALTO...)
1Creator
xml string
Name of the tool, within the Ground Segment element, creating the file (e.g. CS-MCS, IPF1...)
2Creator_Version
xml string
Version of the tool (e.g. 1.0, 2.1a ...)
3Creation_Date
ascii timesize: 23
This is the UTC Creation Date, in CCSDS ASCII format with time reference

unit: "s since 2000-01-01"

value: if(str(., 23) == "UTC=9999-99-99T99:99:99", +inf, if(str(., 23) == "UTC=9999-12-31T23:59:59", +inf, if(str(., 23) == "UTC=0000-00-00T00:00:00", -inf, time(str(.), "'UTC='yyyy-MM-dd'T'HH:mm:ss|'TAI='yyyy-MM-dd'T'HH:mm:ss|'GPS='yyyy-MM-dd'T'HH:mm:ss|'UT1='yyyy-MM-dd'T'HH:mm:ss"))))
ascii stringsize: 23
CCSDS ASCII datetime with time reference "RRR=YYYY-MM-DDThh:mm:ss". The reference RRR can be any of "UT1", "UTC", "TAI", or "GPS".