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ASA_XCH_AX: ASAR External characterization data
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ASA_WS__BP: ASAR Wide Swath Browse Image
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ASA_WV__0P: ASAR Wave Mode Level 0
ASA_WS__0P: ASAR Wide Swath Mode Level 0
ASA_MS__0P: ASAR Level 0 Module Stepping Mode
ASA_IM__0P: ASAR Image Mode Level 0
ASA_GM__0P: ASAR Global Monitoring Mode Level 0
ASA_EC__0P: ASAR Level 0 External Characterization
ASA_APV_0P: ASAR Alternating Polarization Level 0 (Cross polar V)
ASA_APH_0P: ASAR Alternating Polarization Level 0 (Cross polar H)
ASA_APC_0P: ASAR Alternating Polarization Level 0 (Copolar)
Level 1 Products
ASA_IMS_1P: ASAR Image Mode Single Look Complex
ASA_IMP_1P: ASAR Image Mode Precision Image
ASA_IMM_1P: ASAR Image Mode Medium Resolution Image
ASA_IMG_1P: ASAR Image Mode Ellipsoid Geocoded Image
ASA_GM1_1P: ASAR Global Monitoring Mode Image
ASA_APS_1P: ASAR Alternating Polarization Mode Single Look Complex
ASA_APP_1P: ASAR Alternating Polarization Mode Precision Image
ASA_APM_1P: ASAR Alternating Polarization Medium Resolution Image product
ASA_WSS_1P: Wide Swath Mode SLC Image
ASA_WVS_1P: ASAR Wave Mode Imagette Cross Spectra
ASA_WSM_1P: ASAR Wide Swath Medium Resolution Image
ASA_APG_1P: ASAR Alternating Polarization Ellipsoid Geocoded Image
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6.6.21 SQ ADSRs

There is one Wave Mode (WV) Summary Quality (SQ) Annotation Data Set Record (ADSR) per wave cell. The ADSR contains information pertaining to both the imagette and the spectrum. The ASAR_Wave_SQ_ADSR table shown below consists of the ASAR image SQ information, (found in field# 1 - 39) defined in the table ASAR_SQ1_Image_ADSR(Chapter 6. ) , plus new information pertaining to the cross spectra .

There are two Summary Quality (SQ) ADS s. The first contains information pertaining to MDS 1 and the second contains information pertaining to MDS 2. The format of each SQ ADS is identical, however the values may differ as each describes
a separate MDS.

The information contained in the SQ ADS is a summary of parameters used to establish the quality of the product. This includes Product Confidence Data (PCD) flags, the thresholds used to evaluate the flags , and numerical quality parameters.

The product statistics which are evaluated at each time stamp (each ADSR) and the error message generated will be as follows.


Table 6.59 SQ ADSRs

SQ ADSRs

# Description Units Count Type Size
Data Record
0 zero_doppler_time
Zero doppler time at which Summary Quality information applies
MJD 1 mjd 12 byte(s)
1 attach_flag
Attachment Flag

Set to 1 if all MDSRs corresponding to this ADSR are blank, set to zero otherwise. This flag will always be zero because this ADSR is updated once per slice or scene. Therefore, if there are no MDSRs, this ADSR is not produced at all.

flag 1 BooleanFlag 1 byte(s)
2 input_mean_flag
Input data mean outside nominal range flag

0 = mean of I and Q input values are both within specified range from expected mean. For expected mean of x, the measured mean must fall between x-threshold to x+threshold. 1 = otherwise

flag 1 BooleanFlag 1 byte(s)
3 input_std_dev_flag
Input data standard deviation outside nominal range flag

0 = standard deviation values of I and Q input values are both within specified range of expected standard deviation. For expected std. dev. x, the measured std. dev. must fall between x-threshold to x+threshold. 1 = otherwise

flag 1 BooleanFlag 1 byte(s)
4 input_gaps_flag
Significant gaps in the input data flag

0 = number of input gaps <= threshold value 1 = number of input data gaps > threshold value.

flag 1 BooleanFlag 1 byte(s)
5 input_missing_lines_flag
Missing lines significant flag

0 = percentage of missing lines <= threshold value 1 = percentage of missing lines > threshold value. The number of missing lines is the number of lines missing from the input data, excluding data gaps.

flag 1 BooleanFlag 1 byte(s)
6 dop_cen_flag
Doppler Centroid Uncertain flag

0 = confidence measure >= specified value 1 = confidence measure < specified value. If more than one Doppler centroid estimation is performed in a slice, the flag is set if any confidence measure is less than the threshold.

flag 1 BooleanFlag 1 byte(s)
7 dop_amb_flag
Doppler ambiguity estimate uncertain flag

0 = confidence measure >= specified value 1 = confidence measure < specified value

flag 1 BooleanFlag 1 byte(s)
8 output_mean_flag
Output data mean outside nominal range flag

0 = mean of I and Q output values for SLC image or mean of detected pixels for a detected product, are both within specified range from expected mean. For expected mean of x, the measured mean must fall between x-threshold to x+threshold. 1= otherwise.

flag 1 BooleanFlag 1 byte(s)
9 output_std_dev_flag
Output data standard deviation outside nominal range flag

0 = mean of I and Q output values for SLC image or mean of detected pixels for a detected product, are both within specified range from expected mean. For expected mean of x, the measured mean must fall between x-threshold to x+threshold. 1 = otherwise

flag 1 BooleanFlag 1 byte(s)
10 chirp_flag
Chirp extraction failed or is of low quality flag

0 = able to reconstruct all chirps or chirp reconstruction not requested (nominal chirp used) AND all quality measures were acceptable. 1 = unable to reconstruct a chirp during processing and chirp reconstruction was requested or the quality is below the acceptable levels. When value = 1, (i.e. unable to reconstruct a chirp during processing and chirp reconstruction was requested or the quality is below the acceptable levels), PF-ASAR uses the nominal range pulse for processing and a nominal elevation beam scaling factor.

flag 1 BooleanFlag 1 byte(s)
11 missing_data_sets_flag
Data sets missing flag

0 = all data sets which are supposed to be in the product are present 1 = any data sets (including ADSs) are missing from the product which are supposed to be included under normal circumstances. When value = 1 (i.e any data sets, including ADSs, are missing from the product which are supposed to be included under normal circumstances), which data sets are missing can be determined by an examination of the DSDs in the SPH.

flag 1 BooleanFlag 1 byte(s)
12 invalid_downlink_flag
Invalid downlink parameters flag

0 = all parameters read from the downlinked data were valid 1 = displayed if any downlink parameter is out of range and therefore a default value has been used during processing.

flag 1 BooleanFlag 1 byte(s)
13 spare_1
Spare
- 1 SpareField 7 byte(s)
14 thresh_chirp_broadening
Threshold for setting the chirp quality flag.

Maximum percentage broadening permitted in cross-correlation pulse width compared to theoretical width.

% 1 fl 4 byte(s)
15 thresh_chirp_sidelobe
Threshold for setting the chirp quality flag

First sidelobe of the chirp cross correlation function

dB 1 fl 4 byte(s)
16 thresh_chirp_islr
Threshold for setting the chirp quality flag

ISLR of the chirp cross correlation function

dB 1 fl 4 byte(s)
17 thresh_input_mean
Threshold for setting the mean of input data quality flag

For an expected mean value of x, this is the value T, such that the measured mean must fall between the x-T and x+T.

- 1 fl 4 byte(s)
18 exp_input_mean
Expected mean input value for this product for both I and Q.
- 1 fl 4 byte(s)
19 thresh_input_std_dev
Threshold for setting the standard deviation of input data quality flag

For an expected standard deviation value of y, this is the value D, such that the measured standard deviation must fall between the y-D and y+D.

- 1 fl 4 byte(s)
20 exp_input_std_dev
Expected input std. dev. for this product for both I and Q.
- 1 fl 4 byte(s)
21 thresh_dop_cen
Threshold for setting the Doppler Centroid quality flag

Threshold for Doppler Centroid confidence

- 1 fl 4 byte(s)
22 thresh_dop_amb
Threshold for setting the Doppler Centroid ambiguity quality flag

Threshold for setting the Doppler Centroid ambiguity confidence flag

- 1 fl 4 byte(s)
23 thresh_output_mean
Threshold for setting the mean of output data quality flag

For an expected mean value of x, this is the value T, such that the measured mean must fall between the x-T and x+T.

- 1 fl 4 byte(s)
24 exp_output_mean
Expected mean output value for this product. For an SLC product this is the expected mean of both the I and Q values.
- 1 fl 4 byte(s)
25 thresh_output_std_dev
Threshold for setting the standard deviation of output data quality flag

For an expected standard deviation value of y, this is the value D, such that the measured standard deviation must fall between the y-D and y+D.

- 1 fl 4 byte(s)
26 exp_output_std_dev
Expected output std. dev. for this product. For an SLC product this is the expected output std. dev. for both I and Q values.
- 1 fl 4 byte(s)
27 thresh_input_missing_lines
Threshold for setting the missing lines quality flag

Maximum percentage of missing lines to total lines.

% 1 fl 4 byte(s)
28 thresh_input_gaps
Threshold for setting the missing gaps quality flag

Maximum number of missing gaps allowed.

- 1 fl 4 byte(s)
29 lines_per_gaps
Number of missing lines which constitute a gap
lines 1 ul 4 byte(s)
30 spare_2
Spare
- 1 SpareField 15 byte(s)
31 input_mean
Input data mean

I channel, Q channel

- 2 fl 2*4 byte(s)
32 input_std_dev
Input data standard deviation

I channel, Q channel

- 2 fl 2*4 byte(s)
33 num_gaps
Number of gaps

Composed of a predetermined number of consecutive missing lines

- 1 fl 4 byte(s)
34 num_missing_lines
Number of missing lines

Excluding gaps

- 1 fl 4 byte(s)
35 output_mean
Output data mean

For detected products: second value is set to zero, or I channel followed by Q channel for SLC

- 2 fl 2*4 byte(s)
36 output_std_dev
Output data standard deviation

For detected products: second value is set to zero, or I channel followed by Q channel for SLC

- 2 fl 2*4 byte(s)
37 tot_errors
Total number of errors detected in isp headers
- 1 ul 4 byte(s)
38 Spare_3
Spare
- 1 SpareField 16 byte(s)
39 land_flag
Land Flag

0 = no land in imagette 1 = land in imagette

flag 1 BooleanFlag 1 byte(s)
40 look_conf_flag
Look image statistics confidence parameter flag

1 = The ratio of the standard deviation to the mean of the first look image is outside the range given by a minimum and a maximum threshold. 0 =otherwise

flag 1 BooleanFlag 1 byte(s)
41 inter_look_conf_flag
Inter-look confidence statistics confidence parameter flag

1 = The normalised deviation of the two inter-look sub-images is greater than a maximum threshold. 0 = otherwise

flag 1 BooleanFlag 1 byte(s)
42 az_cutoff_flag
Azimuth cut-off convergence measure flag

1 = The normalised RMS error between the fitted co-variance profile is greater than a maximum threshold. 0 = otherwise

flag 1 BooleanFlag 1 byte(s)
43 az_cutoff_iteration_flag
Azimuth cut-off Iteration count overflow flag

1 = The Azimuth cut-off fit did not converge within a minimum number of iterations. 0 = otherwise

flag 1 BooleanFlag 1 byte(s)
44 phase_flag
Phase information confidence measure flag

1 = The imaginary spectral peak is less than a minimum threshold, and the zero lag shift is greater than a minimum threshold. 0 = otherwise

flag 1 BooleanFlag 1 byte(s)
45 spare_4
Spare
- 1 SpareField 4 byte(s)
46 look_conf_thresh
Look image statistics confidence parameter thresholds (minimum and maximum)
- 2 fl 2*4 byte(s)
47 inter_look_conf_thresh
Inter-look confidence statistics confidence parameter threshold
- 1 fl 4 byte(s)
48 az_cutoff_thresh
Azimuth cut-off convergence measure threshold
- 1 fl 4 byte(s)
49 az_cutoff_iterations_thresh
Azimuth cut-off Iteration count overflow threshold
- 1 ul 4 byte(s)
50 phase_peak_thresh
Phase information confidence measure threshold for the spectral peak
- 1 fl 4 byte(s)
51 phase_cross_thresh
Phase information confidence measure threshold for cross covariance peak offset
m 1 fl 4 byte(s)
52 spare_5
Spare
- 1 SpareField 12 byte(s)
53 look_conf
Look image statistics confidence parameter

The ratio of the standard deviation to the mean of the first look image.

- 1 fl 4 byte(s)
54 inter_look_conf
Inter-look confidence statistics confidence parameter.The normalised deviation of the two inter-look sub-images
- 1 fl 4 byte(s)
55 az_cutoff
Azimuth cut-off convergence measure

The normalised RMS error between the fitted co-variance profile.

- 1 fl 4 byte(s)
56 phase_peak_conf
Phase information confidence measure for the spectral peakThe imaginary spectral peak
- 1 fl 4 byte(s)
57 phase_cross_conf
Phase information confidence measure for cross covariance peak offset
m 1 fl 4 byte(s)
58 spare_6
Spare
- 1 SpareField 12 byte(s)
Record Length : 252

DS_NAME : SQ ADSRs



Format Version 114.0