Calibrated narrow-band V2 data files are text files that areproduced by the ISC V2 calibration applicationnbCalib. Thefollowing gives an example of the output of nbCalib in default mode:
# Calibrating star HDC195987 at 20 32 51.642 +41 53 54.522
# with respect to 4 calibrators:
# star HDC195194 at 20 28 25.791 +39 19 44.250 size 0.67 error 0.1 2.7 degrees away from target
# star HDC200031 at 20 59 42.912 +38 49 22.504 size 0.6 error 0.1 6 degrees away from target
# star HDC177196 at 19 01 26.368 +46 56 05.325 size 0.7 error 0.06 17 degrees away from target
# star HDC185395 at 19 36 26.538 +50 13 15.970 size 0.84 error 0.04 13 degrees away from target
# Calibration code settings for this run:
# > Calibrating all wavebands
# > 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
# 271 data lines read from 100180.spec
# Calibration data format:
# name #VisPts MJD m/d/y/h:m:s UT Delay(m) #Chan \> WL(um) CalVis Err RawVis Err SysVis Err... \> #Cal U(m) V(m) HA(hr) BLName
# Target HDC195987:
HDC195987 5 51723.37614 01/01/2000/9:1:38 9.0274 -32.2712 5 2.396 0.717954 0.185974 0.5772 0.147111 0.803951 0.0371808 2.299 0.818887 0.054887 0.5996 0.0299239 0.732213 0.0327609 2.203 1.04916 0.110158 0.7392 0.0530713 0.704562 0.0539792 2.106 0.671904 0.162046 0.4934 0.114967 0.734331 0.0456897 2.009 -0.260067 1.31634 -0.1524 0.77102 0.586004 0.0904048 3 -49.483712 -96.068125 -0.860713 KI_K1K2...
# 9 calibrated scans output under name HDC195987
# 9 total calibrated scans output on target HDC195987
The first section of the output is an extended preamble (with commentlines indicated by # symbols) containing the following pieces:
The second section of the file containes a list of calibrated outputdata. For each specified target/pseudonym there is a designation header, and then a sequence of space delimited data lines. The contents 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 |
NChannels |
Number of spectrometer channels (integer) |
|
8 + 7*(i-1) |
Wavelength i |
Channel i wavelength (microns) (float) |
|
9 + 7*(i-1) |
CalVis i |
Channel i calibrated visibility (dimensionless) (float) |
|
10 + 7*(i-1) |
ErrVis i |
Channel i std error in calibrated visibility (dimensionless) (float) |
|
11 + 7*(i-1) |
RawVis i |
Channel i raw (L-1) visibility (dimensionless) (float) |
|
12 + 7*(i-1) |
ErrRawVis i |
Channel i std error in raw visibility (dimensionless) (float) |
|
13 + 7*(i-1) |
SysVis i |
Channel i estimated system visibility (dimensionless) |
|
14 + 7*(i-1) |
ErrSysVis i |
Channel i std error in system visibility (dimensionless) (float) |
|
15 + 7*NChannels |
# Cals |
Number of calibrators used in calibrating this scan (integer) |
|
16 + 7*NChannels |
uCoord |
u * lambda -- RA baseline projection (m) (float) |
|
17 + 7*NChannels |
vCoord |
v * lambda -- Dec baseline projection (m) (float) |
|
18 + 7*NChannels |
HRangle |
Hour angle on target for this scan (decimal hours) (float) |
|
19 + 7*NChannels |
Baseline |
Baseline designation for this scan (e.g. KI_K1K2) (string) |
where the channel index i runs from 1 to NChannels.
More detailed information is available in the documentation for nbCalib