ERS Envisat ALOS-ADEN  
   PCS Home 20-May-2013     
GOMOS
Articles & Studies
Consolidated Datasets
Documentation
Mission events history
Planned occultation maps
Reports
Search:
Advanced Search
Glossary
FAQ
Contact us
 
Select period:
GOMOS Daily Report 17-AUG-2007

GOMOS Daily Report 17-AUG-2007


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
20AUG2007 11:43:08
Data source version
GOMOS/5.00
Start time of products
17-08-2007 (17AUG2007 00:00:00)
Stop time of products
18-08-2007 (18AUG2007 00:00:00)
Store outputs in DB
Yes
Nb of level 1b prods
49
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
17-AUG-2007 01:37:56
1ZetCMa
177
28556
17-AUG-2007 03:18:32
1ZetCMa
177
28557

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_1PNPDE20070817_001345_000000462060_00446_28556_0405.N1
17-AUG-2007 00:13:45
Dark
46.000
9
Alp Eri
0.45300
24000.
92
28556
No
2
GOM_TRA_1PNPDE20070817_001928_000000412060_00446_28556_0406.N1
17-AUG-2007 00:19:28
Straylight
40.500
148
Alp Tuc
2.8780
4100.0
81
28556
No
3
GOM_TRA_1PNPDE20070817_002302_000000402060_00446_28556_0407.N1
17-AUG-2007 00:23:02
Straylight
40.000
31
Alp Gru
1.7340
15200.
80
28556
No
4
GOM_TRA_1PNPDE20070817_002600_000000402060_00446_28556_0408.N1
17-AUG-2007 00:26:00
Straylight
40.000
172
Gam Gru
3.0030
13100.
80
28556
No
5
GOM_TRA_1PNPDE20070817_004031_000000362060_00446_28556_0409.N1
17-AUG-2007 00:40:31
Bright
36.000
11
53Alp Aql
0.76500
8000.0
72
28556
No
6
GOM_TRA_1PNPDE20070817_004746_000000392060_00446_28556_0410.N1
17-AUG-2007 00:47:46
Bright
39.000
92
53Eps Cyg
2.5000
4500.0
78
28556
No
7
GOM_TRA_1PNPDE20070817_004922_000000382060_00446_28556_0411.N1
17-AUG-2007 00:49:22
Bright
37.500
66
37Gam Cyg
2.2080
5900.0
75
28556
No
8
GOM_TRA_1PNPDE20070817_005040_000000342060_00446_28556_0412.N1
17-AUG-2007 00:50:40
Bright
34.000
144
18Del Cyg
2.8600
11000.
68
28556
No
9
GOM_TRA_1PNPDE20070817_005620_000000382060_00446_28556_0413.N1
17-AUG-2007 00:56:20
Bright
37.500
89
5Alp Cep
2.4510
8000.0
75
28556
No
10
GOM_TRA_1PNPDE20070817_010323_000000352060_00446_28556_0414.N1
17-AUG-2007 01:03:23
Bright
34.500
49
1Alp UMi
1.9900
6300.0
69
28556
No
11
GOM_TRA_1PNPDE20070817_011626_000000382060_00446_28556_0415.N1
17-AUG-2007 01:16:26
Bright
37.500
42
34Bet Aur
1.9000
10200.
75
28556
No
12
GOM_TRA_1PNPDE20070817_011853_000000392060_00446_28556_0416.N1
17-AUG-2007 01:18:53
Bright
38.500
107
37The Aur
2.6490
11000.
77
28556
No
13
GOM_TRA_1PNPDE20070817_012313_000000482060_00446_28556_0417.N1
17-AUG-2007 01:23:13
Twi_and_stray
47.500
151
13Mu Gem
2.8900
3000.0
95
28556
No
14
GOM_TRA_1PNPDE20070817_012448_000000422060_00446_28556_0418.N1
17-AUG-2007 01:24:48
Twi_and_stray
41.500
44
24Gam Gem
1.9280
11000.
83
28556
No
15
GOM_TRA_1PNPDE20070817_012820_000000492060_00446_28556_0419.N1
17-AUG-2007 01:28:20
Dark
49.000
14
58Alp Ori
0.87000
3000.0
98
28556
No
16
GOM_TRA_1PNPDE20070817_013356_000000412060_00446_28556_0546.N1
17-AUG-2007 01:33:56
Dark
41.000
1
9Alp CMa
-1.4400
11000.
82
28556
No
17
GOM_TRA_1PNPDE20070817_013624_000000462060_00446_28556_0547.N1
17-AUG-2007 01:36:24
Dark
45.500
101
11Alp Lep
2.5820
7000.0
91
28556
No
18
GOM_TRA_1PNPDE20070817_015422_000000422060_00447_28557_0548.N1
17-AUG-2007 01:54:22
Dark
41.500
9
Alp Eri
0.45300
24000.
83
28557
No
19
GOM_TRA_1PNPDE20070817_020004_000000372060_00447_28557_0549.N1
17-AUG-2007 02:00:04
Straylight
37.000
148
Alp Tuc
2.8780
4100.0
74
28557
No
20
GOM_TRA_1PNPDE20070817_020338_000000402060_00447_28557_0550.N1
17-AUG-2007 02:03:38
Straylight
40.000
31
Alp Gru
1.7340
15200.
80
28557
No
21
GOM_TRA_1PNPDE20070817_020636_000000402060_00447_28557_0551.N1
17-AUG-2007 02:06:36
Straylight
39.500
172
Gam Gru
3.0030
13100.
79
28557
No
22
GOM_TRA_1PNPDE20070817_022107_000000372060_00447_28557_0552.N1
17-AUG-2007 02:21:07
Bright
37.000
11
53Alp Aql
0.76500
8000.0
74
28557
No
23
GOM_TRA_1PNPDE20070817_022822_000000372060_00447_28557_0553.N1
17-AUG-2007 02:28:22
Bright
36.500
92
53Eps Cyg
2.5000
4500.0
73
28557
No
24
GOM_TRA_1PNPDE20070817_022958_000000382060_00447_28557_0554.N1
17-AUG-2007 02:29:58
Bright
37.500
66
37Gam Cyg
2.2080
5900.0
75
28557
No
25
GOM_TRA_1PNPDE20070817_023116_000000362060_00447_28557_0555.N1
17-AUG-2007 02:31:16
Bright
35.500
144
18Del Cyg
2.8600
11000.
71
28557
No
26
GOM_TRA_1PNPDE20070817_023655_000000382060_00447_28557_0556.N1
17-AUG-2007 02:36:55
Bright
38.000
89
5Alp Cep
2.4510
8000.0
76
28557
No
27
GOM_TRA_1PNPDE20070817_024359_000000332060_00447_28557_0557.N1
17-AUG-2007 02:43:59
Bright
33.000
49
1Alp UMi
1.9900
6300.0
66
28557
No
28
GOM_TRA_1PNPDE20070817_025702_000000382060_00447_28557_0713.N1
17-AUG-2007 02:57:02
Bright
37.500
42
34Bet Aur
1.9000
10200.
75
28557
No
29
GOM_TRA_1PNPDE20070817_025929_000000392060_00447_28557_0714.N1
17-AUG-2007 02:59:29
Bright
39.000
107
37The Aur
2.6490
11000.
78
28557
No
30
GOM_TRA_1PNPDE20070817_030349_000000452060_00447_28557_0715.N1
17-AUG-2007 03:03:49
Twi_and_stray
44.500
151
13Mu Gem
2.8900
3000.0
89
28557
No
31
GOM_TRA_1PNPDE20070817_030524_000000392060_00447_28557_0716.N1
17-AUG-2007 03:05:24
Twi_and_stray
39.000
44
24Gam Gem
1.9280
11000.
78
28557
No
32
GOM_TRA_1PNPDE20070817_030856_000000602060_00447_28557_0717.N1
17-AUG-2007 03:08:56
Dark
60.000
14
58Alp Ori
0.87000
3000.0
120
28557
No
33
GOM_TRA_1PNPDE20070817_031432_000000352060_00447_28557_0718.N1
17-AUG-2007 03:14:32
Dark
34.500
1
9Alp CMa
-1.4400
11000.
69
28557
No
34
GOM_TRA_1PNPDE20070817_031701_000000472060_00447_28557_0719.N1
17-AUG-2007 03:17:01
Dark
46.500
101
11Alp Lep
2.5820
7000.0
93
28557
No
35
GOM_TRA_1PNPDE20070817_033458_000000472060_00448_28558_0720.N1
17-AUG-2007 03:34:58
Dark
47.000
9
Alp Eri
0.45300
24000.
94
28558
No
36
GOM_TRA_1PNPDE20070817_034041_000000392060_00448_28558_0721.N1
17-AUG-2007 03:40:41
Straylight
39.000
148
Alp Tuc
2.8780
4100.0
78
28558
No
37
GOM_TRA_1PNPDE20070817_034415_000000412060_00448_28558_0722.N1
17-AUG-2007 03:44:15
Straylight
41.000
31
Alp Gru
1.7340
15200.
82
28558
No
38
GOM_TRA_1PNPDE20070817_034713_000000412060_00448_28558_0723.N1
17-AUG-2007 03:47:13
Straylight
41.000
172
Gam Gru
3.0030
13100.
82
28558
No
39
GOM_TRA_1PNPDE20070817_040143_000000382060_00448_28558_0724.N1
17-AUG-2007 04:01:43
Bright
37.500
11
53Alp Aql
0.76500
8000.0
75
28558
No
40
GOM_TRA_1PNPDE20070817_040858_000000382060_00448_28558_0725.N1
17-AUG-2007 04:08:58
Bright
38.000
92
53Eps Cyg
2.5000
4500.0
76
28558
No
41
GOM_TRA_1PNPDE20070817_041034_000000372060_00448_28558_0726.N1
17-AUG-2007 04:10:34
Bright
36.500
66
37Gam Cyg
2.2080
5900.0
73
28558
No
42
GOM_TRA_1PNPDE20070817_041152_000000342060_00448_28558_0727.N1
17-AUG-2007 04:11:52
Bright
34.000
144
18Del Cyg
2.8600
11000.
68
28558
No
43
GOM_TRA_1PNPDE20070817_041731_000000382060_00448_28558_0728.N1
17-AUG-2007 04:17:31
Bright
37.500
89
5Alp Cep
2.4510
8000.0
75
28558
No
44
GOM_TRA_1PNPDE20070817_042435_000000362060_00448_28558_0729.N1
17-AUG-2007 04:24:35
Bright
36.000
49
1Alp UMi
1.9900
6300.0
72
28558
No
45
GOM_TRA_1PNPDE20070817_043738_000000442060_00448_28558_0854.N1
17-AUG-2007 04:37:38
Bright
44.000
42
34Bet Aur
1.9000
10200.
88
28558
No
46
GOM_TRA_1PNPDE20070817_044005_000000582060_00448_28558_0855.N1
17-AUG-2007 04:40:05
Bright
58.000
107
37The Aur
2.6490
11000.
116
28558
No
47
GOM_TRA_1PNPDE20070817_044425_000000472060_00448_28558_0856.N1
17-AUG-2007 04:44:25
Twi_and_stray
46.500
151
13Mu Gem
2.8900
3000.0
93
28558
No
48
GOM_TRA_1PNPDE20070817_044601_000000432060_00448_28558_0857.N1
17-AUG-2007 04:46:01
Twi_and_stray
42.500
44
24Gam Gem
1.9280
11000.
85
28558
No
49
GOM_TRA_1PNPDE20070817_044932_000000562060_00448_28558_0858.N1
17-AUG-2007 04:49:32
Dark
55.500
14
58Alp Ori
0.87000
3000.0
111
28558
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 All products used the DSA observation for the DC computation

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:
16.3265 %
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:
13.840
20.480
NaN
St. deviation:
5.7892
4.4109
NaN
Maximum:
24.638
27.144
NaN
Minimum:
4.3620
4.3123
NaN
Number of data:
10.000
24.000
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:
0.13811
-1.0766
0.12293
-1.1158
St. deviation:
0.31089
2.1403
0.78179
2.4068
Maximum:
3.0000
7.5000
5.2000
8.1000
Minimum:
-2.9000
-10.800
-5.1000
-11.300
Number of data:
9900.0
9900.0
20050.
20050.

 

7.2.2 Trend of daily SATU NEA St. deviation since 1st April 2006 (dark limb)

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_AXNIEC20050627_150713_20030716_120000_20100101_000000
1
17-AUG-2007 00:13:45
CALIBRATION_DATABASE
GOM_CAL_AXVIEC20070814_104912_20070813_000000_20100101_000000
1
17-AUG-2007 00:13:45
LEVEL-1B_PROC_CONFIG
GOM_PR1_AXNIEC20050627_151042_20020301_000000_20100101_000000
1
17-AUG-2007 00:13:45
STAR_CATALOGUE
GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000
1
17-AUG-2007 00:13:45
STELLAR_SPECTRA_DATABANK
GOM_STS_AXNIEC20040308_103538_20020101_160000_20100101_000000
1
17-AUG-2007 00:13:45
ECMWF_FILE
AUX_ECF_AXNECM20070816_062113_20070816_210000_20070817_090000
1
17-AUG-2007 00:13:45
ECMWF_FILE
AUX_ECF_AXNECM20070816_182116_20070817_030000_20070817_150000
45
17-AUG-2007 04:37:38
OPTIONAL_ECMWF_FILE
MISSING
1
17-AUG-2007 00:13:45
ORBIT_DATA_FILE
DOR_NAV_0PNPDE20070816_221117_000057382060_00444_28554_3984.N1
1
17-AUG-2007 00:13:45
ORBIT_DATA_FILE
DOR_NAV_0PNPDE20070816_235214_000057382060_00445_28555_3985.N1
16
17-AUG-2007 01:33:56
ORBIT_DATA_FILE
DOR_NAV_0PNPDE20070817_012752_000041442060_00446_28556_3986.N1
28
17-AUG-2007 02:57:02
ORBIT_DATA_FILE
DOR_NAV_0PNPDE20070817_024215_000057382060_00447_28557_3987.N1
45
17-AUG-2007 04:37:38

Reports
Daily Report Level 2 Dataset IPF v6.01
Daily Reports of NRT data
Data Anomaly Reports
Instrument Anomaly Reports
Monthly Reports
  ©PCS/Esrin/ESA  e-mail webmaster Last modified:
24-Apr-2008