GOMOS Daily Report 12-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
18JAN2012 07:00:55
Data source version
GOMOS/6.01
Start time of products
12JAN2012 06:57:29
Stop time of products
12JAN2012 17:15:44
Store outputs in DB
Yes
Nb of level 1b prods
14
Nb of prods with errors
1

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
12-JAN-2012 00:16:31
EpsCen
77
51624
12-JAN-2012 00:20:02
Alp1Cru
12
51624
12-JAN-2012 00:31:13
Gam2Vel
34
51624
12-JAN-2012 00:33:21
ZetPup
70
51624
12-JAN-2012 00:41:19
9AlpCMa
1
51624
12-JAN-2012 01:56:46
EpsCen
77
51625
12-JAN-2012 02:00:17
Alp1Cru
12
51625
12-JAN-2012 02:11:27
Gam2Vel
34
51625
12-JAN-2012 02:13:36
ZetPup
70
51625
12-JAN-2012 02:21:34
9AlpCMa
1
51625
12-JAN-2012 03:37:00
EpsCen
77
51626
12-JAN-2012 03:40:31
Alp1Cru
12
51626
12-JAN-2012 03:51:41
Gam2Vel
34
51626
12-JAN-2012 03:53:50
ZetPup
70
51626
12-JAN-2012 04:01:48
9AlpCMa
1
51626
12-JAN-2012 05:17:15
EpsCen
77
51627
12-JAN-2012 05:20:46
Alp1Cru
12
51627
12-JAN-2012 05:31:56
Gam2Vel
34
51627
12-JAN-2012 05:34:04
ZetPup
70
51627
12-JAN-2012 05:42:02
9AlpCMa
1
51627
12-JAN-2012 07:01:00
Alp1Cru
12
51628
12-JAN-2012 07:12:10
Gam2Vel
34
51628
12-JAN-2012 07:22:16
9AlpCMa
1
51628
12-JAN-2012 08:41:15
Alp1Cru
12
51629
12-JAN-2012 08:52:24
Gam2Vel
34
51629
12-JAN-2012 09:02:30
9AlpCMa
1
51629
12-JAN-2012 10:21:29
Alp1Cru
12
51630
12-JAN-2012 10:32:39
Gam2Vel
34
51630
12-JAN-2012 10:42:44
9AlpCMa
1
51630
12-JAN-2012 12:01:44
Alp1Cru
12
51631
12-JAN-2012 12:12:53
Gam2Vel
34
51631
12-JAN-2012 12:22:58
9AlpCMa
1
51631
12-JAN-2012 13:41:58
Alp1Cru
12
51632
12-JAN-2012 13:53:07
Gam2Vel
34
51632
12-JAN-2012 14:03:12
9AlpCMa
1
51632
12-JAN-2012 15:22:13
Alp1Cru
12
51633
12-JAN-2012 15:33:22
Gam2Vel
34
51633
12-JAN-2012 15:43:26
9AlpCMa
1
51633
12-JAN-2012 17:02:27
Alp1Cru
12
51634
12-JAN-2012 17:13:36
Gam2Vel
34
51634
12-JAN-2012 17:23:40
9AlpCMa
1
51634
12-JAN-2012 18:39:12
EpsCen
77
51635
12-JAN-2012 18:42:42
Alp1Cru
12
51635
12-JAN-2012 18:53:50
Gam2Vel
34
51635
12-JAN-2012 18:55:59
ZetPup
70
51635
12-JAN-2012 19:03:54
9AlpCMa
1
51635
12-JAN-2012 20:19:26
EpsCen
77
51636
12-JAN-2012 20:22:56
Alp1Cru
12
51636
12-JAN-2012 20:34:05
Gam2Vel
34
51636
12-JAN-2012 20:36:13
ZetPup
70
51636
12-JAN-2012 20:44:08
9AlpCMa
1
51636
12-JAN-2012 21:59:41
EpsCen
77
51637
12-JAN-2012 22:03:10
Alp1Cru
12
51637
12-JAN-2012 22:14:19
Gam2Vel
34
51637
12-JAN-2012 22:16:27
ZetPup
70
51637
12-JAN-2012 22:24:22
9AlpCMa
1
51637
12-JAN-2012 23:39:56
EpsCen
77
51638
12-JAN-2012 23:43:25
Alp1Cru
12
51638
12-JAN-2012 23:54:33
Gam2Vel
34
51638
12-JAN-2012 23:56:42
ZetPup
70
51638

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_1PNPDK20120112_065729_000000413110_00308_51615_0131.N1
12-JAN-2012 06:57:29
Dark
41.000
77
Eps Cen
2.3030
28000.
82
51615
No
2
GOM_TRA_1PNPDK20120112_071418_000000413110_00308_51615_0132.N1
12-JAN-2012 07:14:18
Dark
40.500
70
Zet Pup
2.2460
39000.
81
51615
No
3
GOM_TRA_1PNPDK20120112_083744_000000433110_00309_51616_0165.N1
12-JAN-2012 08:37:44
Dark
42.500
77
Eps Cen
2.3030
28000.
85
51616
No
4
GOM_TRA_1PNPDK20120112_085433_000000423110_00309_51616_0166.N1
12-JAN-2012 08:54:33
Dark
42.000
70
Zet Pup
2.2460
39000.
84
51616
No
5
GOM_TRA_1PNPDK20120112_101759_000000413110_00310_51617_0202.N1
12-JAN-2012 10:17:59
Dark
41.000
77
Eps Cen
2.3030
28000.
82
51617
No
6
GOM_TRA_1PNPDK20120112_103447_000000413110_00310_51617_0203.N1
12-JAN-2012 10:34:47
Dark
41.000
70
Zet Pup
2.2460
39000.
82
51617
No
7
GOM_TRA_1PNPDK20120112_115813_000000423110_00311_51618_0235.N1
12-JAN-2012 11:58:13
Dark
41.500
77
Eps Cen
2.3030
28000.
83
51618
No
8
GOM_TRA_1PNPDK20120112_121501_000000443110_00311_51618_0236.N1
12-JAN-2012 12:15:01
Dark
44.000
70
Zet Pup
2.2460
39000.
88
51618
No
9
GOM_TRA_1PNPDK20120112_133828_000000413110_00312_51619_0266.N1
12-JAN-2012 13:38:28
Dark
40.500
77
Eps Cen
2.3030
28000.
81
51619
No
10
GOM_TRA_1PNPDK20120112_135516_000000443110_00312_51619_0267.N1
12-JAN-2012 13:55:16
Dark
43.500
70
Zet Pup
2.2460
39000.
87
51619
No
11
GOM_TRA_1PNPDK20120112_151842_000000413110_00313_51620_0305.N1
12-JAN-2012 15:18:42
Dark
40.500
77
Eps Cen
2.3030
28000.
81
51620
No
12
GOM_TRA_1PNPDK20120112_153530_000000443110_00313_51620_0306.N1
12-JAN-2012 15:35:30
Dark
44.000
70
Zet Pup
2.2460
39000.
88
51620
No
13
GOM_TRA_1PNPDK20120112_165857_000000423110_00314_51621_0329.N1
12-JAN-2012 16:58:57
Dark
41.500
77
Eps Cen
2.3030
28000.
83
51621
No
14
GOM_TRA_1PNPDK20120112_171544_000000443110_00314_51621_0370.N1
12-JAN-2012 17:15:44
Dark
43.500
70
Zet Pup
2.2460
39000.
87
51621
Yes

 

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_1PNPDK20120112_065729_000000413110_00308_51615_0131.N1
DC map used
GOM_TRA_1PNPDK20120112_071418_000000413110_00308_51615_0132.N1
DC map used
GOM_TRA_1PNPDK20120112_083744_000000433110_00309_51616_0165.N1
DC map used
GOM_TRA_1PNPDK20120112_085433_000000423110_00309_51616_0166.N1
DC map used
GOM_TRA_1PNPDK20120112_101759_000000413110_00310_51617_0202.N1
DC map used
GOM_TRA_1PNPDK20120112_103447_000000413110_00310_51617_0203.N1
DC map used
GOM_TRA_1PNPDK20120112_115813_000000423110_00311_51618_0235.N1
DC map used
GOM_TRA_1PNPDK20120112_121501_000000443110_00311_51618_0236.N1
DC map used
GOM_TRA_1PNPDK20120112_133828_000000413110_00312_51619_0266.N1
DC map used
GOM_TRA_1PNPDK20120112_135516_000000443110_00312_51619_0267.N1
DC map used
GOM_TRA_1PNPDK20120112_151842_000000413110_00313_51620_0305.N1
DC map used
GOM_TRA_1PNPDK20120112_153530_000000443110_00313_51620_0306.N1
DC map used
GOM_TRA_1PNPDK20120112_165857_000000423110_00314_51621_0329.N1
DC map used
GOM_TRA_1PNPDK20120112_171544_000000443110_00314_51621_0370.N1
DC map with no T dep.

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:
18.090
NaN
NaN
St. deviation:
2.2410
NaN
NaN
Maximum:
20.595
NaN
NaN
Minimum:
14.206
NaN
NaN
Number of data:
13.000
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
12-JAN-2012 06:57:29
CALIBRATION_DATABASE
GOM_CAL_AXVIEC20111021_144853_20111020_000000_20500101_000000
1
12-JAN-2012 06:57:29
LEVEL-1B_PROC_CONFIG
GOM_PR1_AXVIEC20110513_081743_20020301_000000_20500101_000000
1
12-JAN-2012 06:57:29
STAR_CATALOGUE
GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000
1
12-JAN-2012 06:57:29
STELLAR_SPECTRA_DATABANK
GOM_STS_AXVIEC20091111_151504_20020101_160000_20500101_000000
1
12-JAN-2012 06:57:29
ECMWF_FILE
AUX_ECA_AXNECM20120112_062114_20120111_210000_20120112_090000
1
12-JAN-2012 06:57:29
ECMWF_FILE
AUX_ECF_AXNECM20120112_062115_20120112_090000_20120112_210000
5
12-JAN-2012 10:17:59
ECMWF_FILE
AUX_ECF_AXNECM20120112_062115_20120112_150000_20120113_030000
11
12-JAN-2012 15:18:42
ECMWF_FILE
AUX_ECA_AXNECM20120112_182015_20120112_090000_20120112_210000
14
12-JAN-2012 17:15:44
OPTIONAL_ECMWF_FILE
MISSING
1
12-JAN-2012 06:57:29
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120110_232344_20120110_195049_20120120_202416
1
12-JAN-2012 06:57:29
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120112_112011_20120111_191404_20120121_212745
7
12-JAN-2012 11:58:13