GOMOS Daily Report 13-JAN-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
19JAN2012 07:00:39
Data source version
GOMOS/6.01
Start time of products
13JAN2012 06:20:54
Stop time of products
13JAN2012 16:39:04
Store outputs in DB
Yes
Nb of level 1b prods
14
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
13-JAN-2012 00:04:37
9AlpCMa
1
51638
13-JAN-2012 01:20:10
EpsCen
77
51639
13-JAN-2012 01:23:39
Alp1Cru
12
51639
13-JAN-2012 01:34:47
Gam2Vel
34
51639
13-JAN-2012 01:36:56
ZetPup
70
51639
13-JAN-2012 01:44:51
9AlpCMa
1
51639
13-JAN-2012 03:00:25
EpsCen
77
51640
13-JAN-2012 03:03:54
Alp1Cru
12
51640
13-JAN-2012 03:15:02
Gam2Vel
34
51640
13-JAN-2012 03:17:10
ZetPup
70
51640
13-JAN-2012 03:25:05
9AlpCMa
1
51640
13-JAN-2012 04:40:39
EpsCen
77
51641
13-JAN-2012 04:44:08
Alp1Cru
12
51641
13-JAN-2012 04:55:16
Gam2Vel
34
51641
13-JAN-2012 04:57:25
ZetPup
70
51641
13-JAN-2012 05:05:19
9AlpCMa
1
51641
13-JAN-2012 06:24:23
Alp1Cru
12
51642
13-JAN-2012 06:35:30
Gam2Vel
34
51642
13-JAN-2012 06:45:33
9AlpCMa
1
51642
13-JAN-2012 08:04:37
Alp1Cru
12
51643
13-JAN-2012 08:15:45
Gam2Vel
34
51643
13-JAN-2012 08:25:47
9AlpCMa
1
51643
13-JAN-2012 09:44:52
Alp1Cru
12
51644
13-JAN-2012 09:55:59
Gam2Vel
34
51644
13-JAN-2012 10:06:01
9AlpCMa
1
51644
13-JAN-2012 11:25:06
Alp1Cru
12
51645
13-JAN-2012 11:36:13
Gam2Vel
34
51645
13-JAN-2012 11:46:15
9AlpCMa
1
51645
13-JAN-2012 13:05:21
Alp1Cru
12
51646
13-JAN-2012 13:16:28
Gam2Vel
34
51646
13-JAN-2012 13:26:29
9AlpCMa
1
51646
13-JAN-2012 14:45:35
Alp1Cru
12
51647
13-JAN-2012 14:56:42
Gam2Vel
34
51647
13-JAN-2012 15:06:43
9AlpCMa
1
51647
13-JAN-2012 16:25:50
Alp1Cru
12
51648
13-JAN-2012 16:36:56
Gam2Vel
34
51648
13-JAN-2012 16:46:57
9AlpCMa
1
51648
13-JAN-2012 18:02:36
EpsCen
77
51649
13-JAN-2012 18:06:04
Alp1Cru
12
51649
13-JAN-2012 18:17:11
Gam2Vel
34
51649
13-JAN-2012 18:19:19
ZetPup
70
51649
13-JAN-2012 18:27:11
9AlpCMa
1
51649
13-JAN-2012 19:42:51
EpsCen
77
51650
13-JAN-2012 19:46:19
Alp1Cru
12
51650
13-JAN-2012 19:57:25
Gam2Vel
34
51650
13-JAN-2012 19:59:33
ZetPup
70
51650
13-JAN-2012 20:07:33
9AlpCMa
1
51650
13-JAN-2012 21:23:06
EpsCen
77
51651
13-JAN-2012 21:26:33
Alp1Cru
12
51651
13-JAN-2012 21:37:39
Gam2Vel
34
51651
13-JAN-2012 21:39:47
ZetPup
70
51651
13-JAN-2012 21:47:53
9AlpCMa
1
51651

2.4 Summary of processed GOM_TRA_1P products

!Warning: No products without errors in BRIGHT limb contitions found
Nr Filename UTC Start time Limb Duration Star Id Star Name Star Mag Star Temp Nb Meas Orbit Prod. error
1
GOM_TRA_1PNPDE20120113_062054_000000423110_00322_51629_3192.N1
13-JAN-2012 06:20:54
Dark
42.000
77
Eps Cen
2.3030
28000.
84
51629
No
2
GOM_TRA_1PNPDE20120113_063739_000000433110_00322_51629_3193.N1
13-JAN-2012 06:37:39
Dark
43.000
70
Zet Pup
2.2460
39000.
86
51629
No
3
GOM_TRA_1PNPDK20120113_080108_000000433110_00323_51630_0513.N1
13-JAN-2012 08:01:08
Dark
42.500
77
Eps Cen
2.3030
28000.
85
51630
No
4
GOM_TRA_1PNPDK20120113_081753_000000423110_00323_51630_0514.N1
13-JAN-2012 08:17:53
Dark
41.500
70
Zet Pup
2.2460
39000.
83
51630
No
5
GOM_TRA_1PNPDK20120113_094123_000000423110_00324_51631_0567.N1
13-JAN-2012 09:41:23
Dark
41.500
77
Eps Cen
2.3030
28000.
83
51631
No
6
GOM_TRA_1PNPDK20120113_095807_000000423110_00324_51631_0568.N1
13-JAN-2012 09:58:07
Dark
41.500
70
Zet Pup
2.2460
39000.
83
51631
No
7
GOM_TRA_1PNPDK20120113_112138_000000423110_00325_51632_0605.N1
13-JAN-2012 11:21:38
Dark
42.000
77
Eps Cen
2.3030
28000.
84
51632
No
8
GOM_TRA_1PNPDK20120113_113821_000000403110_00325_51632_0606.N1
13-JAN-2012 11:38:21
Dark
39.500
70
Zet Pup
2.2460
39000.
79
51632
No
9
GOM_TRA_1PNPDK20120113_130152_000000433110_00326_51633_0641.N1
13-JAN-2012 13:01:52
Dark
42.500
77
Eps Cen
2.3030
28000.
85
51633
No
10
GOM_TRA_1PNPDK20120113_131835_000000453110_00326_51633_0642.N1
13-JAN-2012 13:18:35
Dark
45.000
70
Zet Pup
2.2460
39000.
90
51633
No
11
GOM_TRA_1PNPDK20120113_144207_000000413110_00327_51634_0675.N1
13-JAN-2012 14:42:07
Dark
40.500
77
Eps Cen
2.3030
28000.
81
51634
No
12
GOM_TRA_1PNPDK20120113_145850_000000433110_00327_51634_0676.N1
13-JAN-2012 14:58:50
Dark
42.500
70
Zet Pup
2.2460
39000.
85
51634
No
13
GOM_TRA_1PNPDK20120113_162221_000000423110_00328_51635_0704.N1
13-JAN-2012 16:22:21
Dark
41.500
77
Eps Cen
2.3030
28000.
83
51635
No
14
GOM_TRA_1PNPDK20120113_163904_000000443110_00328_51635_0705.N1
13-JAN-2012 16:39:04
Dark
44.000
70
Zet Pup
2.2460
39000.
88
51635
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_1PNPDE20120113_062054_000000423110_00322_51629_3192.N1
DC map used
GOM_TRA_1PNPDE20120113_063739_000000433110_00322_51629_3193.N1
DC map used
GOM_TRA_1PNPDK20120113_080108_000000433110_00323_51630_0513.N1
DC map used
GOM_TRA_1PNPDK20120113_081753_000000423110_00323_51630_0514.N1
DC map used
GOM_TRA_1PNPDK20120113_094123_000000423110_00324_51631_0567.N1
DC map used
GOM_TRA_1PNPDK20120113_095807_000000423110_00324_51631_0568.N1
DC map used
GOM_TRA_1PNPDK20120113_112138_000000423110_00325_51632_0605.N1
DC map used
GOM_TRA_1PNPDK20120113_113821_000000403110_00325_51632_0606.N1
DC map used
GOM_TRA_1PNPDK20120113_130152_000000433110_00326_51633_0641.N1
DC map used
GOM_TRA_1PNPDK20120113_131835_000000453110_00326_51633_0642.N1
DC map used
GOM_TRA_1PNPDK20120113_144207_000000413110_00327_51634_0675.N1
DC map used
GOM_TRA_1PNPDK20120113_145850_000000433110_00327_51634_0676.N1
DC map used
GOM_TRA_1PNPDK20120113_162221_000000423110_00328_51635_0704.N1
DC map used
GOM_TRA_1PNPDK20120113_163904_000000443110_00328_51635_0705.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:
100.000 %
Reference spectrum computed from DB:
0.00000 %
Reference spectrum with small number of measurements:
0.00000 %
SATU data not used:
0.00000 %

 

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:
17.656
NaN
NaN
St. deviation:
2.1673
NaN
NaN
Maximum:
20.585
NaN
NaN
Minimum:
13.153
NaN
NaN
Number of data:
14.000
NaN
NaN

 

6.2 Plot for DARK 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)


 

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




 

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
13-JAN-2012 06:20:54
CALIBRATION_DATABASE
GOM_CAL_AXVIEC20111021_144853_20111020_000000_20500101_000000
1
13-JAN-2012 06:20:54
CALIBRATION_DATABASE
GOM_CAL_AXVIEC20120113_084220_20120102_000000_20500101_000000
7
13-JAN-2012 11:21:38
LEVEL-1B_PROC_CONFIG
GOM_PR1_AXVIEC20110513_081743_20020301_000000_20500101_000000
1
13-JAN-2012 06:20:54
STAR_CATALOGUE
GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000
1
13-JAN-2012 06:20:54
STELLAR_SPECTRA_DATABANK
GOM_STS_AXVIEC20091111_151504_20020101_160000_20500101_000000
1
13-JAN-2012 06:20:54
ECMWF_FILE
AUX_ECA_AXNECM20120113_062115_20120112_210000_20120113_090000
1
13-JAN-2012 06:20:54
ECMWF_FILE
AUX_ECF_AXNECM20120113_062115_20120113_090000_20120113_210000
5
13-JAN-2012 09:41:23
ECMWF_FILE
AUX_ECF_AXNECM20120113_062116_20120113_150000_20120114_030000
13
13-JAN-2012 16:22:21
OPTIONAL_ECMWF_FILE
MISSING
1
13-JAN-2012 06:20:54
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120112_232015_20120112_183719_20120122_205100
1
13-JAN-2012 06:20:54