GOMOS Daily Report 04-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
07MAR2012 07:01:26
Data source version
GOMOS/6.01
Start time of products
04MAR2012 00:46:33
Stop time of products
04MAR2012 23:46:15
Store outputs in DB
Yes
Nb of level 1b prods
22
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
04-MAR-2012 19:50:54
50GamAql
118
52383
04-MAR-2012 20:25:45
DelCen
99
52383
04-MAR-2012 23:46:13
DelCen
99
52385

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_1PNPDE20120304_004633_000000393112_00189_52358_4826.N1
04-MAR-2012 00:46:33
Bright
38.500
166
17Eps Leo
2.9800
6000.0
77
52358
No
2
GOM_TRA_1PNPDE20120304_013808_000000443112_00189_52358_4849.N1
04-MAR-2012 01:38:08
Dark
44.000
155
41Pi Sgr
2.9000
6600.0
88
52358
No
3
GOM_TRA_1PNPDE20120304_031822_000000413112_00190_52359_4889.N1
04-MAR-2012 03:18:22
Dark
41.000
155
41Pi Sgr
2.9000
6600.0
82
52359
No
4
GOM_TRA_1PNPDE20120304_045837_000000443112_00191_52360_4943.N1
04-MAR-2012 04:58:37
Dark
44.000
155
41Pi Sgr
2.9000
6600.0
88
52360
No
5
GOM_TRA_1PNPDK20120304_063852_000000413112_00192_52361_9596.N1
04-MAR-2012 06:38:52
Dark
40.500
155
41Pi Sgr
2.9000
6600.0
81
52361
No
6
GOM_TRA_1PNPDK20120304_080916_000000393112_00193_52362_9631.N1
04-MAR-2012 08:09:16
Bright
38.500
118
50Gam Aql
2.7180
4600.0
77
52362
No
7
GOM_TRA_1PNPDK20120304_081906_000000343112_00193_52362_9632.N1
04-MAR-2012 08:19:06
Dark
33.500
155
41Pi Sgr
2.9000
6600.0
67
52362
No
8
GOM_TRA_1PNPDK20120304_094930_000000403112_00194_52363_9666.N1
04-MAR-2012 09:49:30
Bright
39.500
118
50Gam Aql
2.7180
4600.0
79
52363
No
9
GOM_TRA_1PNPDK20120304_095920_000000273112_00194_52363_9667.N1
04-MAR-2012 09:59:20
Dark
26.500
155
41Pi Sgr
2.9000
6600.0
53
52363
No
10
GOM_TRA_1PNPDK20120304_112944_000000393112_00195_52364_9699.N1
04-MAR-2012 11:29:44
Bright
39.000
118
50Gam Aql
2.7180
4600.0
78
52364
No
11
GOM_TRA_1PNPDK20120304_130959_000000413112_00196_52365_9739.N1
04-MAR-2012 13:09:59
Bright
40.500
118
50Gam Aql
2.7180
4600.0
81
52365
No
12
GOM_TRA_1PNPDK20120304_134449_000000263112_00197_52366_9740.N1
04-MAR-2012 13:44:49
Dark
25.500
99
Del Cen
2.5750
26000.
51
52366
No
13
GOM_TRA_1PNPDK20120304_145013_000000413112_00197_52366_9781.N1
04-MAR-2012 14:50:13
Bright
40.500
118
50Gam Aql
2.7180
4600.0
81
52366
No
14
GOM_TRA_1PNPDK20120304_152503_000000293112_00198_52367_9782.N1
04-MAR-2012 15:25:03
Dark
28.500
99
Del Cen
2.5750
26000.
57
52367
No
15
GOM_TRA_1PNPDK20120304_163027_000000413112_00198_52367_9812.N1
04-MAR-2012 16:30:27
Bright
40.500
118
50Gam Aql
2.7180
4600.0
81
52367
No
16
GOM_TRA_1PNPDK20120304_170518_000000313112_00199_52368_9813.N1
04-MAR-2012 17:05:18
Dark
30.500
99
Del Cen
2.5750
26000.
61
52368
No
17
GOM_TRA_1PNPDK20120304_181042_000000403112_00199_52368_9835.N1
04-MAR-2012 18:10:42
Bright
40.000
118
50Gam Aql
2.7180
4600.0
80
52368
No
18
GOM_TRA_1PNPDK20120304_184532_000000333112_00200_52369_9836.N1
04-MAR-2012 18:45:32
Dark
32.500
99
Del Cen
2.5750
26000.
65
52369
No
19
GOM_TRA_1PNPDE20120304_213110_000000393112_00201_52370_5167.N1
04-MAR-2012 21:31:10
Bright
39.000
118
50Gam Aql
2.7180
4600.0
78
52370
No
20
GOM_TRA_1PNPDE20120304_220601_000000383112_00202_52371_5191.N1
04-MAR-2012 22:06:01
Dark
38.000
99
Del Cen
2.5750
26000.
76
52371
No
21
GOM_TRA_1PNPDE20120304_231124_000000423112_00202_52371_5192.N1
04-MAR-2012 23:11:24
Bright
41.500
118
50Gam Aql
2.7180
4600.0
83
52371
No
22
GOM_TRA_1PNPDE20120304_234615_000000403112_00203_52372_5218.N1
04-MAR-2012 23:46:15
Dark
40.000
99
Del Cen
2.5750
26000.
80
52372
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_1PNPDE20120304_004633_000000393112_00189_52358_4826.N1
DC map used
GOM_TRA_1PNPDE20120304_013808_000000443112_00189_52358_4849.N1
DC map used
GOM_TRA_1PNPDE20120304_031822_000000413112_00190_52359_4889.N1
DC map used
GOM_TRA_1PNPDE20120304_045837_000000443112_00191_52360_4943.N1
DC map used
GOM_TRA_1PNPDK20120304_063852_000000413112_00192_52361_9596.N1
DC map used
GOM_TRA_1PNPDK20120304_080916_000000393112_00193_52362_9631.N1
DC map used
GOM_TRA_1PNPDK20120304_081906_000000343112_00193_52362_9632.N1
DC map used
GOM_TRA_1PNPDK20120304_094930_000000403112_00194_52363_9666.N1
DC map used
GOM_TRA_1PNPDK20120304_095920_000000273112_00194_52363_9667.N1
DC map used
GOM_TRA_1PNPDK20120304_112944_000000393112_00195_52364_9699.N1
DC map used
GOM_TRA_1PNPDK20120304_130959_000000413112_00196_52365_9739.N1
DC map used
GOM_TRA_1PNPDK20120304_134449_000000263112_00197_52366_9740.N1
DC map used
GOM_TRA_1PNPDK20120304_145013_000000413112_00197_52366_9781.N1
DC map used
GOM_TRA_1PNPDK20120304_152503_000000293112_00198_52367_9782.N1
DC map used
GOM_TRA_1PNPDK20120304_163027_000000413112_00198_52367_9812.N1
DC map used
GOM_TRA_1PNPDK20120304_170518_000000313112_00199_52368_9813.N1
DC map used
GOM_TRA_1PNPDK20120304_181042_000000403112_00199_52368_9835.N1
DC map used
GOM_TRA_1PNPDK20120304_184532_000000333112_00200_52369_9836.N1
DC map used
GOM_TRA_1PNPDE20120304_213110_000000393112_00201_52370_5167.N1
DC map used
GOM_TRA_1PNPDE20120304_220601_000000383112_00202_52371_5191.N1
DC map used
GOM_TRA_1PNPDE20120304_231124_000000423112_00202_52371_5192.N1
DC map used
GOM_TRA_1PNPDE20120304_234615_000000403112_00203_52372_5218.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:
45.4545 %
Reference spectrum computed from DB:
0.00000 %
Reference spectrum with small number of measurements:
0.00000 %
SATU data not used:
45.4545 %

 

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:
32.053
17.786
NaN
St. deviation:
16.422
1.3350
NaN
Maximum:
58.057
19.833
NaN
Minimum:
13.626
15.554
NaN
Number of data:
12.000
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:
0.11962
-0.23746
0.11944
-0.23304
St. deviation:
0.93221
1.0328
0.48347
0.57466
Maximum:
20.000
8.4000
3.4000
3.2000
Minimum:
-8.7000
-25.400
-3.5000
-3.5000
Number of data:
11400.
11400.
8950.0
8950.0
90Percentile:
1.3000
1.1000
0.70000
0.50000

 

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
04-MAR-2012 00:46:33
CALIBRATION_DATABASE
GOM_CAL_AXVIEC20120130_103112_20120125_000000_20500101_000000
1
04-MAR-2012 00:46:33
LEVEL-1B_PROC_CONFIG
GOM_PR1_AXVIEC20110513_081743_20020301_000000_20500101_000000
1
04-MAR-2012 00:46:33
STAR_CATALOGUE
GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000
1
04-MAR-2012 00:46:33
STELLAR_SPECTRA_DATABANK
GOM_STS_AXVIEC20091111_151504_20020101_160000_20500101_000000
1
04-MAR-2012 00:46:33
ECMWF_FILE
AUX_ECF_AXNECM20120303_062116_20120303_210000_20120304_090000
1
04-MAR-2012 00:46:33
ECMWF_FILE
AUX_ECF_AXNECM20120303_180351_20120304_030000_20120304_150000
3
04-MAR-2012 03:18:22
ECMWF_FILE
AUX_ECA_AXNECM20120304_062614_20120303_210000_20120304_090000
5
04-MAR-2012 06:38:52
ECMWF_FILE
AUX_ECF_AXNECM20120304_062615_20120304_090000_20120304_210000
8
04-MAR-2012 09:49:30
ECMWF_FILE
AUX_ECF_AXNECM20120304_062615_20120304_150000_20120305_030000
15
04-MAR-2012 16:30:27
ECMWF_FILE
AUX_ECF_AXNECM20120304_062616_20120304_210000_20120305_090000
19
04-MAR-2012 21:31:10
OPTIONAL_ECMWF_FILE
MISSING
1
04-MAR-2012 00:46:33
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120302_232834_20120301_184045_20120311_205427
1
04-MAR-2012 00:46:33