KI V2 Data Products
Calibrated V2 Output Description
Calibrated wide-band V2 data files are text files that areproduced by the ISC V2 calibration applicationwbCalib. The following gives an example of the output of wbCalib in default mode:
# option Kband
# 1 command line arguments processed
# >> Calibrating star HDC102713 at 11 49 41.715 +34 55 54.329
# >> with respect to 1 calibrators:
# >> star HDC101501 at 11 41 03.017 +34 12 05.888 size 0.9 error 0.06 1.9 degrees away from target
# Wideband calibration code settings for this run:
# > Calibrating only K-band (rejecting others at read)
# > Calibrating all frame rates
# > Calibrating incoherent spectrometer V2 data
# > Applying jitter correction
# > Using calibration scans within +/- 1 hr of the target scan
# > Weighting calibration scans WRT temporal proximity, variance doubles in 1 hr
# > Weighting calibration scans WRT sky proximity, variance doubles in 15 deg
# > No minimum calibrated scan uncertainty
# > Flagging calibration warnings when multiple calibrators disagree by more than 2 sigma
# > Rejecting the scan when multiple calibrators disagree by more than 3 sigma
# 246 data lines read from /home/bode/pti/data/100/100074.sum
# 295 data lines read from /home/bode/pti/data/100/100075.sum
# 356 data lines read from /home/bode/pti/data/100/100076.sum...
# Calibration data format:
# name #VisPts MJD m/d/y/h:m:s UT Delay(m) WL(um) \> CalVis Err RawVis Err SysVis Err #Cal \> U(m) V(m) HA(hr) FrameRate BLName
# Target HDC102713:
HDC102713 5 51618.30862 01/01/2000/7:24:24 7.40684 -18.4294 2.2078 0.628617 0.0181397 0.550502 0.0105877 0.875735 0.0188394 1 -46.877792 -99.115972 -0.66552 50 PTI_NS
HDC102713 5 51618.32589 01/01/2000/7:49:16 7.82132 -14.5302 2.2072 0.533166 0.0158086 0.46699 0.00989155 0.87588 0.0181731 1 -40.930193 -101.853953 -0.249901 50 PTI_NS
HDC102713 5 51618.35305 01/01/2000/8:28:23 8.47326 -9.49788 2.2044 0.435681 0.0118706 0.377309 0.00526829 0.866021 0.0202618 1 -30.624757 -105.368530 0.403829 50 PTI_NS
# 161 calibrated scans output under name HDC102713
# 161 total calibrated scans output on target HDC102713
The first section of the file is an extended preamble (with commentlines indicated by # symbols) containing the following pieces:
- Indications of any option flags that were passed to wbCalib
- What sources will be calibrated with respect to what calibrators
- A summary of how the data is to be calibrated -- a summary of the settings for this run
- A summary of where the input data is being found
- A template line giving the format of the data to follow
The second section of the file containes a list of calibrated outputdata. For each specified target/pseudonym there is a designationheader, and then a sequence of space delimited data lines. Thecontents of these data lines is described by the following table:
|
field# |
content |
comments |
|---|---|---|
|
1 |
Target Designation |
Target Designation (string) |
|
2 |
# SUM Records |
# of sum records averaged into this target scan (integer) |
|
3 |
MJD |
Modified Julian Date (day) (float) |
|
4 |
UTC Date/Time |
UTC Date/time in dd/mm/yyyy/hh:mm:ss format (string) |
|
5 |
UTC |
UTC Time (decimal hours) (float) |
|
6 |
Delay |
Average delay (m) (float) |
|
7 |
Wavelength |
SNR-weighted mean wavelength for scan (microns) (float) |
|
8 |
CalVis |
Calibrated wide-band visibility (dimensionless) |
|
9 |
ErrVis |
Std Error in calibrated visibility (dimensionless) |
|
10 |
RawVis |
Raw (L-1) wide-band visibility (dimensionless) |
|
11 |
ErrRawVis |
Std error in raw wide-band visibility (dimensionless) |
|
12 |
SysVis |
Estimated system visibility (dimensionless) |
|
13 |
ErrSysVis |
Std Error in estimated system visibility (dimensionless) |
|
14 |
# Cals |
Number of calibrators used in calibrating this scan (integer) |
|
15 |
uCoord |
u * lambda -- RA baseline projection (m) (float) |
|
16 |
vCoord |
v * lambda -- Dec baseline projection (m) (float) |
|
17 |
HRangle |
Hour angle on target for this scan (decimal hours) (float) |
|
18 |
Frame Rate |
Frame rate for this scan (Hz) (integer) |
|
19 |
Baseline |
Baseline designation for this scan (e.g. KI_K1K2) (string) |
More detailed information is available in the documentation for wbCalib