| id | field name | definition |
|---|
| 0 | zero_doppler_time |
| binary time | size: 12 |
|---|
Zero doppler time at which SQ information applies
unit: "s since 2000-01-01"
value: float(./days) * 86400 + float(./seconds) + float(./microseconds) / 1000000
| binary record | size: 12 |
|---|
ENVISAT binary datetime
| id | field name | definition |
|---|
| 0 | days |
| binary int32 | size: 4 |
|---|
days since January 1st, 2000 (may be negative)
unit: "days since 2000-01-01"
|
|
| 1 | seconds |
| binary uint32 | size: 4 |
|---|
seconds since start of day
unit: "s"
|
|
| 2 | microseconds |
| binary uint32 | size: 4 |
|---|
microseconds since start of second
unit: "1e-6 s"
|
|
|
|
|
| 1 | attach_flag |
| binary int8 | size: 1 |
|---|
|
Attachment Flag. Set to 1 if PF-ASAR was unable to produce an imagette for the wave cell. The fields in other DSR's corresponding to this one are set to zero, apart from the Zero Doppler Time.
|
|
| 2 | input_mean_flag |
| binary int8 | size: 1 |
|---|
|
Input data mean outside nominal range flag0 = 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
|
|
| 3 | input_std_dev_flag |
| binary int8 | size: 1 |
|---|
|
Input data standard deviation outside nominal range flag0 = 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
|
|
| 4 | input_gaps_flag |
| binary int8 | size: 1 |
|---|
|
Significant gaps in the input data flagAn input data gap is defined as a contiguous block of N missing lines (the value of N is predefined for each product)0 = number of input gaps <= threshold value1 = number of input data gaps > threshold value
|
|
| 5 | input_missing_lines_flag |
| binary int8 | size: 1 |
|---|
|
Missing lines significant flag 0 = percentage of missing lines <= threshold value 1 = percentage of missing lines > threshold valueThe number of missing lines is the number of lines missing from the input data excluding data gaps
|
|
| 6 | dop_cen_flag |
| binary int8 | size: 1 |
|---|
|
Doppler Centroid Uncertain flag0 = confidence measure >= specified value1 = Error message generated if confidence measure < specified value(note: if more than one Doppler centroid estimation is performed in a slice the flag is set if any confidence measur
|
|
| 7 | dop_amb_flag |
| binary int8 | size: 1 |
|---|
|
Doppler ambiguity estimate uncertain flag0 = confidence measure >= specified value1 = confidence measure < specified value
|
|
| 8 | output_mean_flag |
| binary int8 | size: 1 |
|---|
|
Output data mean outside nominal range flag0 = 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
|
|
| 9 | output_std_dev_flag |
| binary int8 | size: 1 |
|---|
|
Output data standard deviation outside nominal range flag0 = std. dev. of I and Q output values for SLC image or std. dev. of detected pixels for a detected product, are both within specified range from expected std. dev. For expected std. dev. of x, the
|
|
| 10 | chirp_flag |
| binary int8 | size: 1 |
|---|
|
Chirp extraction failed or is of low quality flag 0 = able to extract all chirps or chirp extraction not requested (nominal chirp used) AND all quality measures were acceptable.1 = unable to extract a chirp during processing and chirp extraction was reque
|
|
| 11 | missing_data_sets_flag |
| binary int8 | size: 1 |
|---|
|
Data sets missing flag0 = all data sets which are supposed to be in the product are present1 = 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 det
|
|
| 12 | invalid_downlink_flag |
| binary int8 | size: 1 |
|---|
|
Invalid downlink parameters flag0 = all parameters read from the downlinked data were valid1 = displayed if any downlink parameter is out of range and therefore a default value has been used during processing.
|
|
| 13 | spare_1 |
| binary bytes | size: 7 |
|---|
|
Spare
|
hidden: true
|
| 14 | thresh_chirp_broadening |
| binary float | size: 4 |
|---|
Threshold for setting the chirp quality flag. Maximum percentage broadening permitted in cross-correlation pulse width compared to theoretical width
unit: "%"
|
|
| 15 | thresh_chirp_sidelobe |
| binary float | size: 4 |
|---|
Threshold for setting the chirp quality flag - First sidelobe of the chirp cross correlation function
unit: "dB"
|
|
| 16 | thresh_chirp_islr |
| binary float | size: 4 |
|---|
Threshold for setting the chirp quality flag - ISLR of the chirp cross correlation function
unit: "dB"
|
|
| 17 | thresh_input_mean |
| binary float | size: 4 |
|---|
|
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.
|
|
| 18 | exp_input_mean |
| binary float | size: 4 |
|---|
|
Expected mean input value for this product for both I and Q
|
|
| 19 | thresh_input_std_dev |
| binary float | size: 4 |
|---|
|
Threshold for setting the standard deviation of input data quality flag - For an expected std. dev. value of y, this is the value D, such that the measured std. dev. must fall between the y-D and y+D.
|
|
| 20 | exp_input_std_dev |
| binary float | size: 4 |
|---|
|
Expected input std. dev. for this product for both I and Q
|
|
| 21 | thresh_dop_cen |
| binary float | size: 4 |
|---|
|
Threshold for setting the Doppler Centroid quality flag - Threshold for Doppler Centroid confidence
|
|
| 22 | thresh_dop_amb |
| binary float | size: 4 |
|---|
|
Threshold for setting the Doppler Centroid ambiguity quality flag - Threshold for setting the Doppler Centroid ambiguity confidence flag
|
|
| 23 | thresh_output_mean |
| binary float | size: 4 |
|---|
|
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.
|
|
| 24 | exp_output_mean |
| binary float | size: 4 |
|---|
|
Expected mean output value for this product. For an SLC product this is the expected mean of both the I and Q values
|
|
| 25 | thresh_output_std_dev |
| binary float | size: 4 |
|---|
|
Threshold for setting the standard deviation of output data quality flag - For an expected std. dev. value of y, this is the value D, such that the measured std. dev. must fall between the y-D and y+D
|
|
| 26 | exp_output_std_dev |
| binary float | size: 4 |
|---|
|
Expected output std. dev. for this product. For an SLC product this is the expected output std. dev. for both I and Q values
|
|
| 27 | thresh_input_missing_lines |
| binary float | size: 4 |
|---|
Threshold for setting the missing lines quality flag - maximum percentage of missing lines to total lines
unit: "%"
|
|
| 28 | thresh_input_gaps |
| binary float | size: 4 |
|---|
|
Threshold for setting the missing gaps quality flag - maximum number of missing gaps allowed
|
|
| 29 | lines_per_gaps |
| binary uint32 | size: 4 |
|---|
|
Number of missing lines which constitute a gap
|
|
| 30 | spare_2 |
| binary bytes | size: 15 |
|---|
|
Spare
|
hidden: true
|
| 31 | input_mean |
| binary array[2] | size: 8 |
|---|
Input data mean (i channel, q channel)
|
|
| 32 | input_std_dev |
| binary array[2] | size: 8 |
|---|
Input data standard deviation (i channel, q channel)
|
|
| 33 | num_gaps |
| binary float | size: 4 |
|---|
|
Number of gaps (composed of a predetermined number of consecutive missing lines)
|
|
| 34 | num_missing_lines |
| binary float | size: 4 |
|---|
|
Number of missing lines (excluding gaps)
|
|
| 35 | output_mean |
| binary array[2] | size: 8 |
|---|
Output data mean (detected samples, followed by zero, or i channel followed by q channel for SLC)
|
|
| 36 | output_std_dev |
| binary array[2] | size: 8 |
|---|
Output data standard deviation (detected samples followed by zero, or i channel followed by q channel for SLC)
|
|
| 37 | tot_errors |
| binary uint32 | size: 4 |
|---|
|
Total number of errors detected in ISP headers
|
|
| 38 | spare_3 |
| binary bytes | size: 16 |
|---|
|
Spare
|
hidden: true
|
| 39 | land_flag |
| binary int8 | size: 1 |
|---|
|
Land Flag 0 = no land in imagette1 = land in imagette
|
|
| 40 | look_conf_flag |
| binary int8 | size: 1 |
|---|
|
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
|
|
| 41 | inter_look_conf_flag |
| binary int8 | size: 1 |
|---|
|
Inter-look confidence statistics confidence parameter flag1 = The normalised deviation of the two inter-look sub-images is greater than a maximum threshold.0 = otherwise
|
|
| 42 | az_cutoff_flag |
| binary int8 | size: 1 |
|---|
|
Azimuth cut-off convergence measure flag1 = The normalised RMS error between the fitted co-variance profile is greater than a maximum threshold.0 = otherwise
|
|
| 43 | az_cutoff_iteration_flag |
| binary int8 | size: 1 |
|---|
|
Azimuth cut-off Iteration count overflow flag1 = The Azimuth cut-off fit did not converge within a minimum number of iterations.0 = otherwise
|
|
| 44 | phase_flag |
| binary int8 | size: 1 |
|---|
|
Phase information confidence measure flag1 = The imaginary spectral peak is less than a minimum threshold, and the zero lag shift is greater than a minimum threshold.0 = otherwise.
|
|
| 45 | spare_4 |
| binary bytes | size: 4 |
|---|
|
Spare
|
hidden: true
|
| 46 | look_conf_thresh |
| binary array[2] | size: 8 |
|---|
Look image statistics confidence parameter thresholds (minimum and maximum)
|
|
| 47 | inter_look_conf_thresh |
| binary float | size: 4 |
|---|
|
Inter-look confidence statistics confidence parameter threshold
|
|
| 48 | az_cutoff_thresh |
| binary float | size: 4 |
|---|
|
Azimuth cut-off convergence measure threshold
|
|
| 49 | az_cutoff_iterations_thresh |
| binary uint32 | size: 4 |
|---|
|
Azimuth cut-off Iteration count overflow threshold
|
|
| 50 | phase_peak_thresh |
| binary float | size: 4 |
|---|
|
Phase information confidence measure threshold for the spectral peak
|
|
| 51 | phase_cross_thresh |
| binary float | size: 4 |
|---|
Phase information confidence measure threshold for cross covariance peak offset
unit: "m"
|
|
| 52 | spare_5 |
| binary bytes | size: 12 |
|---|
|
Spare
|
hidden: true
|
| 53 | look_conf |
| binary float | size: 4 |
|---|
|
Look image statistics confidence parameterThe ratio of the standard deviation to the mean of the first look image
|
|
| 54 | inter_look_conf |
| binary float | size: 4 |
|---|
|
Inter-look confidence statistics confidence parameter.The normalised deviation of the two inter-look sub-images
|
|
| 55 | az_cutoff |
| binary float | size: 4 |
|---|
|
Azimuth cut-off convergence measureThe normalised RMS error between the fitted co-variance profile
|
|
| 56 | phase_peak_conf |
| binary float | size: 4 |
|---|
|
Phase information confidence measure for the spectral peakThe imaginary spectral peak
|
|
| 57 | phase_cross_conf |
| binary float | size: 4 |
|---|
Phase information confidence measure for cross covariance peak offset
unit: "m"
|
|
| 58 | spare_6 |
| binary bytes | size: 12 |
|---|
|
Spare
|
hidden: true
|