Keywords: mira

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### MONITOR section

The MONITOR section describes all parameters associated with the data. MONITOR data are recorded independently from the backend data (DATA section). The interpolation of data associated parameters at the backend timestamps is written into the data substructure of the DATA section (see above).
Each frontend-backend combination has its own MONITOR section, i.e. MON1%HEADER and MON1%DATA for frontend-backend combination 1, MON2%HEADER and MON2%DATA for frontend-backend combination 2, etc.
Weather data and load temperatures are expected to be monitored several times per scan. For the time being, there is only one entry per imbFits file (except for HERA cold load temperatures).

MON1 | S |  |
MON1%HEADER | S |  |
MON1%HEADER%DATE_OBS | C*23 |  | observing date in TIMESYS
|  |  | system
MON1%HEADER%FOCOBS_X_Y_Z | 3 D | mm | X,Y,Z focus correction
MON%HEADER%IAOBS_CAOBS_IEOBS | 3 D | arcsec | Pointing corrections, to be added
|  |  | to IA (P1), CA (P2) and IE (P7).
|  |  | In old 30m control system terms:
|  |  | IAOBS = NULA,
|  |  | CAOBS = COL*,
|  |  | IEOBS = NULE
MON1%HEADER%OBSNUM | I |  | observation number
MON1%HEADER%SCANNUM | I |  | scan number

MON1%DATA | S |  |
MON1%DATA%REFRACTIO | D | arcsec | refraction correction
MON1%DATA%THOTCOLD | D | K | hot & cold load temperature
MON1%DATA%TAMB_P_HUMID | D | C, hPa, % | ambient temperature,
|  |  | pressure and rel. humidity
MON1%DATA%ANTENNA_AZ_EL | 2 D | deg | SAZM & SELV from old
|  |  | control system
MON1%DATA%LONGOFF | D | deg | long. offset from source in
|  |  | user native frame
MON1%DATA%LATOFF | D | deg | lat. offset from source in
|  |  | user native frame
MON1%DATA%BASLONG | D | deg | actual long. in astronomical
|  |  | basis frame, inc. wobbler
|  |  | offsets
MON1%DATA%BASLAT | D | deg | actual lat. in astronomical
|  |  | basis frame, inc. wobbler
|  |  | offsets
MON1%DATA%PARANGLE | D | deg | parallactic angle
MON%DATA%PHI_X_Y_Z | D | deg | Phi (subrefl. rotation) X, Y, Z
|  |  | (see MBFITS manual)
MON1%DATA%FOCUS_X_Y_Z | D |  | focus offsets and timestamp:
|  | mm | X subreflector position
|  | mm | Y subreflector position
|  | mm | Z subreflector position
|  | day | MJD timestamp in IMBF-
|  |  | subreflector binary table
MON1%DATA%DFOCUS_X_Y_Z | D | mm | focus (subreflector position)
|  |  | offsets X, Y, Z
MON1%DATA%TRACKING_AZ_EL | D | deg | antenna tracking errors in
|  |  | azimuth and elevation
MON1%DATA%ENCODER_AZ_EL | D |  | encoder azimuth & elevation
|  |  | and timestamp
|  | deg | encoder azimuth
|  | deg | encoder elevation
|  | day | MJD time of IMBF-antenna
|  |  | binary table (fast track)
MON1%DATA%MJD | D | day | MJD time of IMBF-antenna
|  |  | binary table (slow track)

The `MON` structure only contains data that are used for interpolation. Daten taken e.g. between subsequent subscans, before scan start or after scan end do not have a SIC copy, except for the encoder values and tracking errors, written into structure `ANTENNA`. This structure is activated together with the `MON` structure (i.e. upon `MIRA\VARIABLE mon`), and contains (with ):

ANTENNA%TRACKING_AZ_EL | D | deg | antenna tracking errors in
|  |  | azimuth and elevation
ANTENNA%ENCODER_AZ_EL | D |  | encoder azimuth & elevation
|  |  | and timestamp
|  | deg | encoder azimuth
|  | deg | encoder elevation
|  | day | MJD timestamp

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