March 29, 2021

GAP Lv1 Data File


CASSIOPE SPACECRAFT (Swarm-E)
PROCESSED DATA HANDBOOK

GAP Lv1 Data File

GAP level 1 data files are generated for each GAP turn-on session, and for each receiver that was operating. They contain the raw, binary NovAtel receiver GPS message packets, as defined in reference R2, from the constituent GAP receivers (GPS-0 through GPS-4).

The file names are GAP_YYYYMMDD_HHMMSS_hhmmss_RCVR_N_vX-Z.lv1 where:

YYYYyear
MMmonth
DDday
HHstart hour
MMstart minute
SSstart second
hhend hour
mmend minute
ssend second
NGAP Receiver number
Xversion number
Zminor revision number

Gap receivers are located on the spacecraft as follows: