KI Nuller Data Products

Summary (.nullsum) File Description

Summary files are ASCII text files that contain the L-1 Nuller data for KI. The following gives an example of a line from a KI summary file:

NULLSUM 08/30/2007/08:50:42 8.845270 HD176678 0.02629 7.99734 NULL 0.04279 NULL 43373.25000 19562.10352 19513.18164

NULL NULL NULL 860 86.16280 NULL 100 OUT N1.2 0 KI_K1K2

The line consists of a number of space-delimited fields. The meanings of these fields are summarized in the table below. Each line corresponds to an average of all the data in one integration on a source. All entries, including time and delay line position, are mean values. A # as the leading character indicates a comment.

field# content comments

1 NULLSUM File identifier. Each line starts with NULLSUM to support the grep extraction mechanism from the intermediate data file produced by the L1 reduction code (nullerl1).

2 Observation Date (string)
UTC date of the observation (mm/dd/yyyy/hh:mm:ss)

3 Observation Time (float)
Start of the observation time (decimal UTC hours)

4 Source Designation (string)
Source designation (ASCII string)

5 FDL Optical Path (float)
Mean fast delay line optical path difference (m)

6 LDL Optical Path (float)
Mean long delay line optical path difference (m)

7 Wideband Flux (float)
KALI mean wideband flux. (DN, 8-9 microns)

8 Null Leakage (float)
Broadband null leakage (8-9 microns)

9 Null Leakage Error (float)
Broadband null leakage error

10 SNR2 XC (float)
Cross combiner fringe SNR2

11 SNR2 Primary (float)
Primary fringe SNR2

12 SNR2 Secondary (float)
Secondary fringe SNR2

13 rNN (float)
Real part null-null fringe

14 jNN (float)
Imaginary part null-null fringe

15 Effective Broadband Wavelength (float)
Effective Broadband wavelength (microns)

16 Number of Cycles (int)
Number of cycles in measurement

17 Gated Cycles (float)
Percent cycles that pass quality gates

18 Duration (int)
Duration of measurement (sec)

19 Mode (int)
Signifies nulling measurement mode used

20 Ports (string)
Ports used in measurement (IN, OUT, or IN+OUT)

21 L1 Data Producer (string)
Which code produced this L1 file (Nx.y or Mx.y, N=nuller_l1, M=Colavita code, x.y=version)

22 Calibration Flag (int)
Data quality flag

23 Baseline (string)
Baseline designation

field#	content	comments
1	NULLSUM	File identifier. Each line starts with NULLSUM to support the grep extraction mechanism from the intermediate data file produced by the L1 reduction code (nullerl1).
2	Observation Date (string)	UTC date of the observation (mm/dd/yyyy/hh:mm:ss)
3	Observation Time (float)	Start of the observation time (decimal UTC hours)
4	Source Designation (string)	Source designation (ASCII string)
5	FDL Optical Path (float)	Mean fast delay line optical path difference (m)
6	LDL Optical Path (float)	Mean long delay line optical path difference (m)
7	Wideband Flux (float)	KALI mean wideband flux. (DN, 8-9 microns)
8	Null Leakage (float)	Broadband null leakage (8-9 microns)
9	Null Leakage Error (float)	Broadband null leakage error
10	SNR2 XC (float)	Cross combiner fringe SNR2
11	SNR2 Primary (float)	Primary fringe SNR2
12	SNR2 Secondary (float)	Secondary fringe SNR2
13	rNN (float)	Real part null-null fringe
14	jNN (float)	Imaginary part null-null fringe
15	Effective Broadband Wavelength (float)	Effective Broadband wavelength (microns)
16	Number of Cycles (int)	Number of cycles in measurement
17	Gated Cycles (float)	Percent cycles that pass quality gates
18	Duration (int)	Duration of measurement (sec)
19	Mode (int)	Signifies nulling measurement mode used
20	Ports (string)	Ports used in measurement (IN, OUT, or IN+OUT)
21	L1 Data Producer (string)	Which code produced this L1 file (Nx.y or Mx.y, N=nuller_l1, M=Colavita code, x.y=version)
22	Calibration Flag (int)	Data quality flag
23	Baseline (string)	Baseline designation

Last updated: Feb 13, 2008