### DATA section

There is one DATA section per frontend-backend combination. The following list is for frontend-backend combination 1 (the corresponding structure names for combination 2 were DATA2%HEADER and DATA2%DATA, and so on). Data associated parameters are interpolated from the monitor data (next section) at the MIDTIME timestamp of the backend data.

DATA1%HEADER | S |  |
DATA1%HEADER%CHANNELS | I |  | number of channels (for concatenated basebands)
DATA1%HEADER%OBSTATUS | C*10 |  | Observation o.k. ? (OK/ABORT)
DATA1%HEADER%DPBLOCK | L |  | Data blocking ?
DATA1%HEADER%OBSTYPE | C*1 |  | observation type (CAL, REF, ON, HOT, COLD, SKY)
DATA1%HEADER%LST | D | s | Local apparent sidereal time (obs. start)
DATA1%HEADER%DATE_OBS | C*23 |  | observation start in TIMESYS system
DATA1%HEADER%OBSNUM | I |  | observation number
DATA1%HEADER%SCANNUM | I |  | scan number
DATA1%HEADER%FEBE | C*17 |  | frontend-backend identification
DATA1%DATA%AZIMUTH | D | deg | azimuth inc. wobbler offsets
DATA1%DATA%BASLONG | D | deg | actual long. in astronomical basis frame,
|  |  | inc. wobbler offsets
DATA1%DATA%BASLAT | D | deg | actual lat. in astronomical basis frame,
|  |  | inc. wobbler offsets
DATA1%DATA%CBASLONG | D | deg | commanded long. in astr. basis frame,
|  |  | inc. wobbler offsets
DATA1%DATA%CBASLAT | D | deg | commanded lat. in astr. basis frame,
|  |  | inc. wobbler offsets
DATA1%DATA%ELEVATIO | D | deg | elevation inc. wobbler offsets
DATA1%DATA%DFOCUS_X_Y_Z | D | mm | (opt.) focus offsets X, Y, Z (subrefl. position)
DATA1%DATA%FOCUS_X_Y_Z | D | mm | focus (subreflector position) X, Y, Z
DATA1%DATA%INTEGTIM | D | s | integration time
DATA1%DATA%INTEGNUM | I |  | integration point number
DATA1%DATA%LST | D | s | local apparent sidereal time
DATA1%DATA%LONGOFF | D | deg | long. offset from source in user native frame
DATA1%DATA%LATOFF | D | deg | lat. offset from source in user native frame
DATA1%DATA%MLONPOLE | D | deg | (opt.) longitude of basis celestial pole in
|  |  | body system
DATA1%DATA%MLATPOLE | D | deg | (opt.) basis latitude of body frame pole
DATA1%DATA%MCRVAL1 | D | deg | (opt.) body apparent long. in basis system
DATA1%DATA%MCRVAL2 | D | deg | (opt.) body apparent lat. in basis system
DATA1%DATA%MIDTIME | D | day | MJD at integration midpoint in TIMESYS
|  |  | system
DATA1%DATA%MJD | D | day | MJD at integration endpoint in TIMESYS
|  |  | system
DATA1%DATA%NINTS | I |  | integrations in block

DATA1%DATA%PHI_X_Y_Z | D | deg | Phi (subreflector rotation)
|  |  | X, Y, Z (see MBFITS manual)
DATA1%DATA%PC_11 | D |  | matrix elements of
|  |  | transformation from pixel
|  |  | coordinates to intermediate
|  |  | pixel coordinates
|  |  | (projection of user frame)
DATA1%DATA%PC_12 | D |  |
DATA1%DATA%PC_21 | D |  |
DATA1%DATA%PC_22 | D |  |
DATA1%DATA%PARANGLE | D | deg | parallactic angle
DATA1%DATA%SUBSCAN | I |  | subscan number of data point
DATA1%DATA%OTFDATA | R | counts, [K] | OTF data with basebands
|  |  | concatenated and off subtracted
DATA1%DATA%RDATA | R | counts, [K] | single pointing data, basebands
|  |  | concatenated and off subtracted