CALATMOSPHERE Atmosphere measurement results

Name

Format

Units

Measure

Comments

Columns

Key

CAL_DATA_ID

Int Calibration data identifier

CAL_REDUCTION_ID

Int Calibration reduction identifier

ANTENNA_ID

Int Antenna identifier

FEED_ID

Int Feed identifier

SPECTRAL_WINDOW_ID

Int Spectral window identifier

Data

START_VALID_TIME

Double s EPOCH Start time of result validity period

END_VALID_TIME

Double s EPOCH End time of result validity period

SYSCAL_TYPE

String Single direction / skydip

TSYS_SPECTRUM

Float( Nr, Nf) K System temperature spectrum

TRX_SPECTRUM

Float( Nf) K Receiver temperature spectrum

TSKY_SPECTRUM

Float( Nr, Nf) Sky temperature spectrum

TAU_SPECTRUM

Float( Nr, Nf) Atmosheric optical depth spectrum

SBGAIN_SPECTRUM

Float( Nr, Nf) Relative gain spectrum

FEFF_SPECTRUM

Float( Nr, Nf) Forward efficiency spectrum

(TSYS)

Float( Nr) K System temperature

(TRX)

Float( Nr) K Receiver temperature

(TSKY)

Float( Nr) K Sky temperature

(TAU)

Float( Nr) K Atmosheric optical depth

(SBGAIN)

Float Relative gain of LO1 sideband

(PWVPATH)

Float( Nr) m Water vapor pathlength

(FEFF_SPECTRUM)

Float( Nr, Nf) Forward efficiency spectrum


Notes: This table contains time-variable calibration measurements for each antenna, as indexed on feed and spectral window. Nr is the number of receptors and Nf the number of frequency channels.
CAL_DATA_ID
Calibration data identifier
CAL_REDUCTION_ID
Calibration reduction identifier
ANTENNA_ID
Antenna identifier
FEED_ID
Feed identifier.
START_VALID_TIME
Start time of result validity period
END_VALID_TIME
End time of result validity period
TSYS_SPECTRUM
System temperature spectrum  
TRX_SPECTRUM
Receiver temperature spectrum. Frequency dependency mandatory for ALMA  
TSYS_SPECTRUM
System temperature spectrum  
TAU_SPECTRUM
Opacity spectrum
SBGAIN_SPECTRUM
Sideband gain spectrum. The other SPECTRAL_WINDOW_ID for the other sideband is know via ASSOC_SPW_ID 
FEFF_SPECTRUM
Fraction of the beam volume spectrum.  
TSYS
System temperature  
TRX
Receiver temperature.  
TSKY
Sky temperature  
TAU
Average opacity
SBGAIN
Sideband gain spectrum. Actual normalization to be defined.
PWVPATH
Water vapor pathlength