GOMOS Daily Report 06-MAR-2012


Level 0 and Level 1 products

SUMMARY

1. General Info

 
2. Summary of products arrived in PCF (Product Control Facility)
2.1 Level 0: products arrived in PCF during current month (see template here)
2.2 Level 0: plot of mission plan versus production during reporting period
2.3 Level 0: summary of missing occultations with respect to the plan
2.4 Level 1: products arrived in PCF during reporting period

 
3. Plot of Spectrometers and Photometers temperatures

 
4. Dark Charge monitoring
4.1 Products that did not use the Dark Sky Area observation for DC computation
4.2 Plot of Dark Charge

 
5. Demodulation correction and quality product information monitoring
5.1 Percentage of products with some flags set
5.2 Plot of quality information per product (time dependant)
5.3 Plot of quality information per product (world map)

 
6. Star tangent altitude lost
6.1 Statistics on star tangent altitude lost
6.2 Plot of star tangent altitude lost: DARK products
6.3 Plot of star tangent altitude lost: BRIGHT products
6.3 Plot of star tangent altitude lost: TWILIGHT products

 
7. Star Acquisition and Tracking Unit (SATU)
7.1 SATU plots (dark limb): 'X' and 'Y' axis
7.2 SATU Noise Equivalent Angle statistics
7.2.1 SATU NEA Statistics (table)
7.2.2 Daily SATU NEA STD (dark limb) - trend since 1st April 2006

 
8.Auxiliary Data Files used for the production reported in section 2.4

 


Level 2 products




 

1. General Info

This report presents the daily analysis on parameters extracted from GOMOS level 1b data (GOM_TRA_1P).
It is intended to monitor some important parameters that will impact the quality of the level 2 products
as the Spectrometers and Photometers CCD Temperatures and Dark Charge, SATU noise equivalent angle...
A list of level 0 products (and content) that have arrived during the actual month to the PCF is also given.
 
Item Value
Time of report generation
10MAR2012 07:00:56
Data source version
GOMOS/6.01
Start time of products
06MAR2012 00:15:23
Stop time of products
06MAR2012 22:10:35
Store outputs in DB
Yes
Nb of level 1b prods
28
Nb of prods with errors
0

2. Summary of products arrived in PCF (Product Control Facility)

2.1 Level 0 products arrived in PCF (see template here)

2.2 Plot of mission plan versus Level 0 production arrived in PCF during reporting period

Red segments are missing products.
Blue segments are available products.
Green segments are calibration measurements (not available products to users).

qds_image

2.3 Summary of missing occultations (red segments in previous plot)

UTC start time Star name Star ID Orbit
06-MAR-2012 00:27:24
38ZetSgr
103
52386
06-MAR-2012 00:34:57
DSA1024
0
52386
06-MAR-2012 05:16:04
53AlpAql
11
52389
06-MAR-2012 05:28:08
38ZetSgr
103
52389
06-MAR-2012 05:35:32
DSA1024
0
52389
06-MAR-2012 05:50:32
DelCen
99
52390
06-MAR-2012 07:15:44
DSA1024
0
52390
06-MAR-2012 08:55:55
DSA1024
0
52391

2.4 Summary of processed GOM_TRA_1P products

Nr Filename UTC Start time Limb Duration Star Id Star Name Star Mag Star Temp Nb Meas Orbit Prod. error
1
GOM_TRA_1PNPDE20120306_001523_000000423112_00217_52386_5603.N1
06-MAR-2012 00:15:23
Bright
42.000
11
53Alp Aql
0.76500
8000.0
84
52386
No
2
GOM_TRA_1PNPDE20120306_004951_000000423112_00218_52387_5630.N1
06-MAR-2012 00:49:51
Straylight
41.500
99
Del Cen
2.5750
26000.
83
52387
No
3
GOM_TRA_1PNPDE20120306_015537_000000433112_00218_52387_5631.N1
06-MAR-2012 01:55:37
Bright
43.000
11
53Alp Aql
0.76500
8000.0
86
52387
No
4
GOM_TRA_1PNPDE20120306_020741_000000423112_00218_52387_5648.N1
06-MAR-2012 02:07:41
Dark
41.500
103
38Zet Sgr
2.6000
9700.0
83
52387
No
5
GOM_TRA_1PNPDE20120306_023005_000000393112_00219_52388_5649.N1
06-MAR-2012 02:30:05
Straylight
39.000
99
Del Cen
2.5750
26000.
78
52388
No
6
GOM_TRA_1PNPDE20120306_033551_000000433112_00219_52388_5701.N1
06-MAR-2012 03:35:51
Bright
42.500
11
53Alp Aql
0.76500
8000.0
85
52388
No
7
GOM_TRA_1PNPDE20120306_034757_000000423112_00219_52388_5702.N1
06-MAR-2012 03:47:57
Dark
41.500
103
38Zet Sgr
2.6000
9700.0
83
52388
No
8
GOM_TRA_1PNPDE20120306_041020_000000393112_00220_52389_5703.N1
06-MAR-2012 04:10:20
Straylight
38.500
99
Del Cen
2.5750
26000.
77
52389
No
9
GOM_TRA_1PNPDE20120306_051606_000000433112_00220_52389_5754.N1
06-MAR-2012 05:16:06
Bright
43.000
11
53Alp Aql
0.76500
8000.0
86
52389
No
10
GOM_TRA_1PNPDE20120306_052810_000000423112_00220_52389_5755.N1
06-MAR-2012 05:28:10
Dark
42.000
103
38Zet Sgr
2.6000
9700.0
84
52389
No
11
GOM_TRA_1PNPDE20120306_055034_000000443112_00221_52390_5756.N1
06-MAR-2012 05:50:34
Straylight
43.500
99
Del Cen
2.5750
26000.
87
52390
No
12
GOM_TRA_1PNPDK20120306_065620_000000433112_00221_52390_0281.N1
06-MAR-2012 06:56:20
Bright
43.000
11
53Alp Aql
0.76500
8000.0
86
52390
No
13
GOM_TRA_1PNPDK20120306_070825_000000443112_00221_52390_0282.N1
06-MAR-2012 07:08:25
Dark
43.500
103
38Zet Sgr
2.6000
9700.0
87
52390
No
14
GOM_TRA_1PNPDK20120306_073049_000000413112_00222_52391_0283.N1
06-MAR-2012 07:30:49
Straylight
41.000
99
Del Cen
2.5750
26000.
82
52391
No
15
GOM_TRA_1PNPDK20120306_083634_000000423112_00222_52391_0318.N1
06-MAR-2012 08:36:34
Bright
42.000
11
53Alp Aql
0.76500
8000.0
84
52391
No
16
GOM_TRA_1PNPDK20120306_084839_000000413112_00222_52391_0319.N1
06-MAR-2012 08:48:39
Dark
41.000
103
38Zet Sgr
2.6000
9700.0
82
52391
No
17
GOM_TRA_1PNPDK20120306_101649_000000433112_00223_52392_0352.N1
06-MAR-2012 10:16:49
Bright
43.000
11
53Alp Aql
0.76500
8000.0
86
52392
No
18
GOM_TRA_1PNPDK20120306_102854_000000433112_00223_52392_0353.N1
06-MAR-2012 10:28:54
Dark
43.000
103
38Zet Sgr
2.6000
9700.0
86
52392
No
19
GOM_TRA_1PNPDK20120306_115703_000000433112_00224_52393_0484.N1
06-MAR-2012 11:57:03
Bright
43.000
11
53Alp Aql
0.76500
8000.0
86
52393
No
20
GOM_TRA_1PNPDK20120306_120908_000000423112_00224_52393_0485.N1
06-MAR-2012 12:09:08
Dark
42.000
103
38Zet Sgr
2.6000
9700.0
84
52393
No
21
GOM_TRA_1PNPDK20120306_133717_000000433112_00225_52394_0528.N1
06-MAR-2012 13:37:17
Bright
43.000
11
53Alp Aql
0.76500
8000.0
86
52394
No
22
GOM_TRA_1PNPDK20120306_134923_000000453112_00225_52394_0529.N1
06-MAR-2012 13:49:23
Dark
44.500
103
38Zet Sgr
2.6000
9700.0
89
52394
No
23
GOM_TRA_1PNPDK20120306_151732_000000333112_00226_52395_0563.N1
06-MAR-2012 15:17:32
Bright
33.000
11
53Alp Aql
0.76500
8000.0
66
52395
No
24
GOM_TRA_1PNPDK20120306_152937_000000423112_00226_52395_0564.N1
06-MAR-2012 15:29:37
Dark
41.500
103
38Zet Sgr
2.6000
9700.0
83
52395
No
25
GOM_TRA_1PNPDK20120306_170952_000000423112_00227_52396_0591.N1
06-MAR-2012 17:09:52
Dark
42.000
103
38Zet Sgr
2.6000
9700.0
84
52396
No
26
GOM_TRA_1PNPDK20120306_185006_000000363112_00228_52397_0618.N1
06-MAR-2012 18:50:06
Dark
36.000
103
38Zet Sgr
2.6000
9700.0
72
52397
No
27
GOM_TRA_1PNPDK20120306_203021_000000313112_00229_52398_0648.N1
06-MAR-2012 20:30:21
Dark
31.000
103
38Zet Sgr
2.6000
9700.0
62
52398
No
28
GOM_TRA_1PNPDE20120306_221035_000000253112_00230_52399_5997.N1
06-MAR-2012 22:10:35
Dark
25.000
103
38Zet Sgr
2.6000
9700.0
50
52399
No

 

3. Plot of GOMOS spectrometers and photometers temperatures from level 1b data

qds_image


 

4. Overview of dark signal processing per product

The Dark Charge (DC) is a temperature-dependant signal added to the useful measurements and it is therefore substracted
from them during the processing. There are two phenomena that produce a continuous increase of the DC: the "hot pixels"
(a pixel is "hot" when its DC exceeds by a significant amount its value measured on ground at the same temperature) and
the "Random Telegraphic Signal" (abrupt change positive or negative of the CCD pixel signal, random in time, affecting
only the DC part of the signal and not the photon generated signal).
In this section a list of products that did not use the Dark Sky Area (DSA) observation for the DC computation is given.
It is also provided the mean DC plot per product for dark limb products with no error flag set.

4.1 These products did not use the DSA observation for DC computation:

Product name DC information
GOM_TRA_1PNPDE20120306_001523_000000423112_00217_52386_5603.N1
DC map used
GOM_TRA_1PNPDE20120306_004951_000000423112_00218_52387_5630.N1
DC map used
GOM_TRA_1PNPDE20120306_015537_000000433112_00218_52387_5631.N1
DC map used
GOM_TRA_1PNPDE20120306_020741_000000423112_00218_52387_5648.N1
DC map used
GOM_TRA_1PNPDE20120306_023005_000000393112_00219_52388_5649.N1
DC map used
GOM_TRA_1PNPDE20120306_033551_000000433112_00219_52388_5701.N1
DC map used
GOM_TRA_1PNPDE20120306_034757_000000423112_00219_52388_5702.N1
DC map used
GOM_TRA_1PNPDE20120306_041020_000000393112_00220_52389_5703.N1
DC map used
GOM_TRA_1PNPDE20120306_051606_000000433112_00220_52389_5754.N1
DC map used
GOM_TRA_1PNPDE20120306_052810_000000423112_00220_52389_5755.N1
DC map used
GOM_TRA_1PNPDE20120306_055034_000000443112_00221_52390_5756.N1
DC map used
GOM_TRA_1PNPDK20120306_065620_000000433112_00221_52390_0281.N1
DC map used
GOM_TRA_1PNPDK20120306_070825_000000443112_00221_52390_0282.N1
DC map used
GOM_TRA_1PNPDK20120306_073049_000000413112_00222_52391_0283.N1
DC map used
GOM_TRA_1PNPDK20120306_083634_000000423112_00222_52391_0318.N1
DC map used
GOM_TRA_1PNPDK20120306_084839_000000413112_00222_52391_0319.N1
DC map used

4.2 Plot of mean dark charges per product: only products in DARK limb conditions without errors are used

qds_image


 

5. Demodulation flag and quality information monitoring

In this section it is presented the modulation information extracted from the pcd (product confidence data)
at measurement level and information extracted from the Quality Summary dataset. Only products without errors
(error flag in the MPH set to "0") are used.

 

5.1 Percentage of products during reporting period with:

At least one measurement with demodulation flag set:
60.7143 %
Reference spectrum computed from DB:
0.00000 %
Reference spectrum with small number of measurements:
0.00000 %
SATU data not used:
35.7143 %

 

5.2 Plot quality information per product (time dependant)

qds_image


 

5.3 Plot quality information per product (world map)

qds_image


 

6. Statistics and plot of tangent altitude of the last measurement (DARK & BRIGHT products without errors)

6.1 Statistics on tangent altitude lost:

Statistics DARK BRIGHT TWILIGHT
Mean:
22.970
16.209
NaN
St. deviation:
13.817
6.2010
NaN
Maximum:
60.917
33.790
NaN
Minimum:
13.922
13.779
NaN
Number of data:
13.000
10.000
NaN

 

6.2 Plot for DARK limb products

qds_image


 

6.3 Plot for BRIGHT limb products

qds_image


 

7. Star Acquisition and Tracking Unit (SATU)

The Star Acquisition and Tracking Unit (SATU) analyses the position of the tracked star beam collected by
the GOMOS telescope and deflected by the optical beam dispatcher. The main functin of the SATU is to detect
a star, provide its image position to the science data electronics and to help the pointing function to keep
the star image at a fixed position. In tracking mode the SATU data is recorded with a frecuency of 100 Hz.

 

7.1 SATU 'X' and 'Y' axis plots (dark limb)

SATU CCD 'X' and 'Y' axis plots are provided in order to detect any abnormal behaviour of the tracking system.
For every occultation (color) the plot should remain stable (with some noise) until we are deep in the atmosphere
where big fluctuations are registered due to the refractive effects.

qds_image

qds_image


 

7.2 Statistics on SATU Noise Equivalent Angle (NEA) for DARK (D) and BRIGHT (B) products above 105 kms

The Star Acquisition and Tracking Unit (it is the CCD that tracks the star while it is occulted) Noise Equivalent
Angle consists of the statistical angular variation of the SATU data above the atmosphere.
Statistics (in microradians) above 105 km are computed for every occultation, giving four values per occultation: one in the 'X'
direction and one in the 'Y' direction for dark and bright limbs. A mean value per day in every direction and limb
is calculated and monitored in order to assess instrument performance in terms of star pointing.

 

7.2.1 SATU NEA Statistics (table)

Statistics SATU X (D) SATU Y (D) SATU X (B) SATU Y (B)
Mean:
0.15258
-0.25629
0.086580
-0.33239
St. deviation:
0.93334
1.0643
0.23360
0.50067
Maximum:
7.9000
5.1000
1.0000
2.1000
Minimum:
-3.5000
-10.100
-1.2000
-4.8000
Number of data:
12450.
12450.
9400.0
9400.0
90Percentile:
1.4000
1.1000
0.40000
0.30000

 

7.2.2 Trend of daily SATU NEA St. deviation since 1st April 2006 (dark limb) and of daily SATU NEA 90th percentile since May 2011

The long term trend of the SATU 'X' and 'Y' standard deviations should be constant during the whole mission.

The colorbar represents the start tangent altitude (km) of the occultations.

Upper curve: STD of SATU Y axis
Lower curve: STD of SATU X axis

qds_image



Lower curve: 90th percentile of SATU Y axis
Upper curve: 90th percentile of SATU X axis

qds_image


 

8. Auxiliary Data Files used for the production reported in section 2.4

The number reported in the third column indicates since which file (see list in section 2.4) the corresponding
auxiliary file has been used. The fourth column is the date of those product files.

 
Type Auxiliary Filename Used since product Used since product date
INST_PHYS_CHARACTERISTICS
GOM_INS_AXVIEC20111213_163131_20111215_000000_20500101_000000
1
06-MAR-2012 00:15:23
CALIBRATION_DATABASE
GOM_CAL_AXVIEC20120130_103112_20120125_000000_20500101_000000
1
06-MAR-2012 00:15:23
LEVEL-1B_PROC_CONFIG
GOM_PR1_AXVIEC20110513_081743_20020301_000000_20500101_000000
1
06-MAR-2012 00:15:23
STAR_CATALOGUE
GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000
1
06-MAR-2012 00:15:23
STELLAR_SPECTRA_DATABANK
GOM_STS_AXVIEC20091111_151504_20020101_160000_20500101_000000
1
06-MAR-2012 00:15:23
ECMWF_FILE
AUX_ECF_AXNECM20120305_062115_20120305_210000_20120306_090000
1
06-MAR-2012 00:15:23
ECMWF_FILE
AUX_ECF_AXNECM20120305_185155_20120306_030000_20120306_150000
6
06-MAR-2012 03:35:51
ECMWF_FILE
AUX_ECA_AXNECM20120306_060730_20120305_210000_20120306_090000
9
06-MAR-2012 05:16:06
ECMWF_FILE
AUX_ECF_AXNECM20120306_060730_20120306_090000_20120306_210000
17
06-MAR-2012 10:16:49
ECMWF_FILE
AUX_ECF_AXNECM20120306_060731_20120306_150000_20120307_030000
23
06-MAR-2012 15:17:32
ECMWF_FILE
AUX_ECA_AXNECM20120306_180730_20120306_090000_20120306_210000
26
06-MAR-2012 18:50:06
ECMWF_FILE
AUX_ECF_AXNECM20120306_060731_20120306_210000_20120307_090000
28
06-MAR-2012 22:10:35
OPTIONAL_ECMWF_FILE
MISSING
1
06-MAR-2012 00:15:23
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120305_233155_20120305_193414_20120315_200740
1
06-MAR-2012 00:15:23