GOMOS Daily Report 15-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
17MAR2012 07:00:43
Data source version
GOMOS/6.01
Start time of products
15MAR2012 00:14:11
Stop time of products
15MAR2012 23:37:34
Store outputs in DB
Yes
Nb of level 1b prods
26
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)

No missing products.

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_1PNPDE20120315_001411_000000453112_00347_52516_9148.N1
15-MAR-2012 00:14:11
Dark
45.000
4
Alp1Cen
-0.010000
5800.0
90
52516
No
2
GOM_TRA_1PNPDE20120315_011442_000000383112_00347_52516_9149.N1
15-MAR-2012 01:14:42
Bright
38.000
19
50Alp Cyg
1.2460
10500.
76
52516
No
3
GOM_TRA_1PNPDE20120315_015426_000000473112_00348_52517_9178.N1
15-MAR-2012 01:54:26
Dark
46.500
4
Alp1Cen
-0.010000
5800.0
93
52517
No
4
GOM_TRA_1PNPDE20120315_025456_000000353112_00348_52517_9206.N1
15-MAR-2012 02:54:56
Bright
35.000
19
50Alp Cyg
1.2460
10500.
70
52517
No
5
GOM_TRA_1PNPDE20120315_033440_000000493112_00349_52518_9207.N1
15-MAR-2012 03:34:40
Dark
48.500
4
Alp1Cen
-0.010000
5800.0
97
52518
No
6
GOM_TRA_1PNPDE20120315_043510_000000383112_00349_52518_9245.N1
15-MAR-2012 04:35:10
Bright
37.500
19
50Alp Cyg
1.2460
10500.
75
52518
No
7
GOM_TRA_1PNPDE20120315_051455_000000573112_00350_52519_9246.N1
15-MAR-2012 05:14:55
Dark
56.500
4
Alp1Cen
-0.010000
5800.0
113
52519
No
8
GOM_TRA_1PNPDK20120315_061524_000000383112_00350_52519_4530.N1
15-MAR-2012 06:15:24
Bright
38.000
19
50Alp Cyg
1.2460
10500.
76
52519
No
9
GOM_TRA_1PNPDK20120315_065509_000000443112_00351_52520_4531.N1
15-MAR-2012 06:55:09
Dark
44.000
4
Alp1Cen
-0.010000
5800.0
88
52520
No
10
GOM_TRA_1PNPDK20120315_075539_000000393112_00351_52520_4585.N1
15-MAR-2012 07:55:39
Bright
38.500
19
50Alp Cyg
1.2460
10500.
77
52520
No
11
GOM_TRA_1PNPDK20120315_083524_000000573112_00352_52521_4586.N1
15-MAR-2012 08:35:24
Dark
56.500
4
Alp1Cen
-0.010000
5800.0
113
52521
No
12
GOM_TRA_1PNPDK20120315_093553_000000363112_00352_52521_4626.N1
15-MAR-2012 09:35:53
Bright
36.000
19
50Alp Cyg
1.2460
10500.
72
52521
No
13
GOM_TRA_1PNPDK20120315_101538_000000453112_00353_52522_4627.N1
15-MAR-2012 10:15:38
Dark
45.000
4
Alp1Cen
-0.010000
5800.0
90
52522
No
14
GOM_TRA_1PNPDK20120315_111606_000000363112_00353_52522_4723.N1
15-MAR-2012 11:16:06
Bright
36.000
19
50Alp Cyg
1.2460
10500.
72
52522
No
15
GOM_TRA_1PNPDK20120315_115553_000000533112_00354_52523_4724.N1
15-MAR-2012 11:55:53
Dark
53.000
4
Alp1Cen
-0.010000
5800.0
106
52523
No
16
GOM_TRA_1PNPDK20120315_125620_000000343112_00354_52523_4883.N1
15-MAR-2012 12:56:20
Bright
34.000
19
50Alp Cyg
1.2460
10500.
68
52523
No
17
GOM_TRA_1PNPDK20120315_133607_000000423112_00355_52524_5028.N1
15-MAR-2012 13:36:07
Dark
41.500
4
Alp1Cen
-0.010000
5800.0
83
52524
No
18
GOM_TRA_1PNPDK20120315_151622_000000433112_00356_52525_4907.N1
15-MAR-2012 15:16:22
Dark
42.500
4
Alp1Cen
-0.010000
5800.0
85
52525
No
19
GOM_TRA_1PNPDK20120315_165636_000000443112_00357_52526_4855.N1
15-MAR-2012 16:56:36
Dark
44.000
4
Alp1Cen
-0.010000
5800.0
88
52526
No
20
GOM_TRA_1PNPDK20120315_183651_000000503112_00358_52527_4936.N1
15-MAR-2012 18:36:51
Dark
50.000
4
Alp1Cen
-0.010000
5800.0
100
52527
No
21
GOM_TRA_1PNPDK20120315_194035_000000383112_00358_52527_4970.N1
15-MAR-2012 19:40:35
Bright
37.500
92
53Eps Cyg
2.5000
4500.0
75
52527
No
22
GOM_TRA_1PNPDK20120315_201705_000000533112_00359_52528_4971.N1
15-MAR-2012 20:17:05
Dark
53.000
4
Alp1Cen
-0.010000
5800.0
106
52528
No
23
GOM_TRA_1PNPDE20120315_212049_000000353112_00359_52528_9438.N1
15-MAR-2012 21:20:49
Bright
35.000
92
53Eps Cyg
2.5000
4500.0
70
52528
No
24
GOM_TRA_1PNPDE20120315_215720_000000463112_00360_52529_9458.N1
15-MAR-2012 21:57:20
Dark
45.500
4
Alp1Cen
-0.010000
5800.0
91
52529
No
25
GOM_TRA_1PNPDE20120315_230103_000000363112_00360_52529_9459.N1
15-MAR-2012 23:01:03
Bright
35.500
92
53Eps Cyg
2.5000
4500.0
71
52529
No
26
GOM_TRA_1PNPDE20120315_233734_000000553112_00361_52530_9485.N1
15-MAR-2012 23:37:34
Dark
54.500
4
Alp1Cen
-0.010000
5800.0
109
52530
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_1PNPDK20120315_111606_000000363112_00353_52522_4723.N1
DC map used
GOM_TRA_1PNPDK20120315_115553_000000533112_00354_52523_4724.N1
DC map used
GOM_TRA_1PNPDK20120315_125620_000000343112_00354_52523_4883.N1
DC map used
GOM_TRA_1PNPDK20120315_133607_000000423112_00355_52524_5028.N1
DC map used
GOM_TRA_1PNPDK20120315_151622_000000433112_00356_52525_4907.N1
DC map used
GOM_TRA_1PNPDK20120315_165636_000000443112_00357_52526_4855.N1
DC map used
GOM_TRA_1PNPDK20120315_183651_000000503112_00358_52527_4936.N1
DC map used
GOM_TRA_1PNPDK20120315_194035_000000383112_00358_52527_4970.N1
DC map used
GOM_TRA_1PNPDK20120315_201705_000000533112_00359_52528_4971.N1
DC map used
GOM_TRA_1PNPDE20120315_212049_000000353112_00359_52528_9438.N1
DC map used
GOM_TRA_1PNPDE20120315_215720_000000463112_00360_52529_9458.N1
DC map used
GOM_TRA_1PNPDE20120315_230103_000000363112_00360_52529_9459.N1
DC map used
GOM_TRA_1PNPDE20120315_233734_000000553112_00361_52530_9485.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:
46.1538 %
Reference spectrum computed from DB:
0.00000 %
Reference spectrum with small number of measurements:
0.00000 %
SATU data not used:
42.3077 %

 

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:
10.587
23.358
NaN
St. deviation:
5.0433
3.1723
NaN
Maximum:
18.324
28.835
NaN
Minimum:
3.3133
19.361
NaN
Number of data:
15.000
11.000
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:
0.18372
-0.28214
-0.0088693
-0.36122
St. deviation:
0.12003
0.35575
0.44861
0.58576
Maximum:
0.60000
1.4000
1.9000
2.2000
Minimum:
-1.0000
-2.9000
-2.0000
-2.9000
Number of data:
14250.
14250.
9800.0
9800.0
90Percentile:
0.30000
0.20000
0.60000
0.40000

 

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
15-MAR-2012 00:14:11
CALIBRATION_DATABASE
GOM_CAL_AXVIEC20120307_084038_20120305_000000_20500101_000000
1
15-MAR-2012 00:14:11
LEVEL-1B_PROC_CONFIG
GOM_PR1_AXVIEC20110513_081743_20020301_000000_20500101_000000
1
15-MAR-2012 00:14:11
STAR_CATALOGUE
GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000
1
15-MAR-2012 00:14:11
STELLAR_SPECTRA_DATABANK
GOM_STS_AXVIEC20091111_151504_20020101_160000_20500101_000000
1
15-MAR-2012 00:14:11
ECMWF_FILE
AUX_ECF_AXNECM20120314_062116_20120314_210000_20120315_090000
1
15-MAR-2012 00:14:11
ECMWF_FILE
AUX_ECF_AXNECM20120314_182802_20120315_030000_20120315_150000
6
15-MAR-2012 04:35:10
ECMWF_FILE
AUX_ECA_AXNECM20120315_062113_20120314_210000_20120315_090000
8
15-MAR-2012 06:15:24
ECMWF_FILE
AUX_ECF_AXNECM20120315_062114_20120315_090000_20120315_210000
12
15-MAR-2012 09:35:53
ECMWF_FILE
AUX_ECA_AXNECM20120315_181040_20120315_090000_20120315_210000
17
15-MAR-2012 13:36:07
ECMWF_FILE
AUX_ECF_AXNECM20120315_062114_20120315_150000_20120316_030000
19
15-MAR-2012 16:56:36
ECMWF_FILE
AUX_ECA_AXNECM20120315_181040_20120315_090000_20120315_210000
20
15-MAR-2012 18:36:51
ECMWF_FILE
AUX_ECF_AXNECM20120315_062115_20120315_210000_20120316_090000
23
15-MAR-2012 21:20:49
OPTIONAL_ECMWF_FILE
MISSING
1
15-MAR-2012 00:14:11
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120314_231646_20120314_122315_20120324_125642
1
15-MAR-2012 00:14:11
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120315_111646_20120314_190411_20120324_211752
14
15-MAR-2012 11:16:06
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120315_232310_20120315_182726_20120325_204107
26
15-MAR-2012 23:37:34