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6.6.20 Wave Mode processing parameters

The Wave Mode (WV) Processing parameters Annotation Data Set (ADS) details all the parameters used to create the SLC imagette and other parameters specific to Wave Mode Imagette processing. These consist of those found in the Main Processing parameters ADS of the Image Products format ( field# 1- 79 have the indentical format as that given by the ASAR_Main_ADSR ), plus Doppler Centroid parameters, Chirp parameters, Antenna Elevation Patterns , Slant Range to Ground Range (SR/GR) parameters, Geolocation Grid Tie points , and parameters specific to Wave Mode. Since the imagette is an SLC image, the SR/GR parameters and Antenna Elevation parameters pertain to the cross spectra creation process, not the imagette itself.

There is one ADSR per wave cell, which provides a complete record of the processing parameters and values used during image formation. The table for these ADSRs is given below:


Table 6.58 Wave Mode processing parameters

Wave Mode processing parameters

# Description Units Count Type Size
Data Record
0 first_zero_doppler_time
First Zero Doppler Azimuth time of MDS which this data set describesTime of first range line in the MDS described by this data set
MJD 1 mjd 12 byte(s)
1 attach_flag
Attachment Flag

Always set to zero for this ADSR

flag 1 BooleanFlag 1 byte(s)
2 last_zero_doppler_time
Last Zero Doppler Azimuth time of MDS which this data set describesTime of last range line in the MDS described by this data set
MJD 1 mjd 12 byte(s)
3 work_order_id
Work Order ID (left-justified)
ascii 1 AsciiString 12 byte(s)
4 time_diff
Time difference between sensing time of first input line and zero Doppler time of first output image line (tdelta).

May be used during child product extraction from a stripline product. Left blank (set to zero) for non-stripline products

s 1 fl 4 byte(s)
5 swath_num
Swath number IS1, IS2, IS3, IS4, IS5, IS6, or IS7 for IM, WV and AP modes.SS1 ,SS2, SS3, SS4, SS5 for WSS Products Ws0 for WS and GM modes where only one ADSR for the whole scene is provided
ascii 1 AsciiString 3 byte(s)
6 range_spacing
Range sample spacing
m 1 fl 4 byte(s)
7 azimuth_spacing
Azimuth sample spacing at image center
m 1 fl 4 byte(s)
8 line_time_interval
Azimuth sample spacing in time (Line Time Interval)
s 1 fl 4 byte(s)
9 num_output_lines
Number of output range lines in the image.For WSS products this number will vary for each sub swath
lines 1 ul 4 byte(s)
10 num_samples_per_line
Number of samples per output range line

includes zero filled samples

samples 1 ul 4 byte(s)
11 data_type
Output data typeSWORD, UWORD, or UBYTE
ascii 1 AsciiString 5 byte(s)
12 num_range_lines_per_burst
Number of output range lines per burst. Not used for single-beam products
lines 1 ul 4 byte(s)
13 time_diff_zero_doppler
Time difference between zero Doppler time and acquisition time of output image lines
s 1 fl 4 byte(s)
14 spare_1
Spare
- 1 SpareField 43 byte(s)
15 data_analysis_flag
Raw Data Analysis used for Raw Data Correction

0 = correction done using default parameters 1 = correction done using raw data analysis results

flag 1 BooleanFlag 1 byte(s)
16 ant_elev_corr_flag
Antenna Elevation Pattern Correction Applied

0 = no correction applied 1 = correction applied

flag 1 BooleanFlag 1 byte(s)
17 chirp_extract_flag
Reconstructed Chirp used

0 = nominal chirp replica used 1 = reconstructed chirp used

flag 1 BooleanFlag 1 byte(s)
18 srgr_flag
Slant Range to Ground Range Conversion Applied

0 = no conversion applied 1 = conversion applied

flag 1 BooleanFlag 1 byte(s)
19 dop_cen_flag
Doppler Centroid Estimation Performed

0 = no estimation done 1 = estimation done

flag 1 BooleanFlag 1 byte(s)
20 dop_amb_flag
Doppler Ambiguity Estimation Performed

0 = no estimate done 1 = estimate done

flag 1 BooleanFlag 1 byte(s)
21 range_spread_comp_flag
Range-spreading loss compensation Applied

0 = no compensation applied 1 = compensation applied

flag 1 BooleanFlag 1 byte(s)
22 detected_flag
Detection Applied

0 = output product is complex 1 = output product was detected

flag 1 BooleanFlag 1 byte(s)
23 look_sum_flag
Look Summation Performed

0 = product is single look 1 = product is multi-looked

flag 1 BooleanFlag 1 byte(s)
24 rms_equal_flag
RMS Equalisation performed

0= rms equalization not performed during FBAQ decoding, 1 = rms equalization performed during FBAQ decoding

flag 1 BooleanFlag 1 byte(s)
25 ant_scal_flag
Antenna Elevation Gain Scaling Factor

applied 0= no scaling factor applied, 1 = scaling factor applied

flag 1 BooleanFlag 1 byte(s)
26 vga_com_echo_flag
Receive Gain Droop Compensation applied to Echo. 0=no compression, 1=compensation applied.
flag 1 BooleanFlag 1 byte(s)
27 vga_com_cal_flag
Receive Gain Droop Compensation applied to Calibration Pulse P2. 0=no compression, 1=compensation applied.
flag 1 BooleanFlag 1 byte(s)
28 vga_com_nom_time_flag
Nominal time delay applied for Receive Gain Droop Compensation of Calibration Pulse P2 order zero. 0=do not use nominal time delay (compensation depends on P2 time delay), 1= use nominal time delay (constant)
flag 1 BooleanFlag 1 byte(s)
29 gm_range_comp_inverse_filter_flag
Inverse filter used for range compression.

(GM Mode only). 0 = matched filter used for range compression 1 = inverse filter used for range compression

flag 1 BooleanFlag 1 byte(s)
30 spare_2
Spare
- 1 SpareField 6 byte(s)
31 raw_data_analysis
The following 26 parameters form a structure which is repeated twice, once for MDS 1 and once for MDS 2

If MDS 2 is not included with the product the second set of values is blanked (all values set to zero)

- 2 raw_data_analysisStruct 2*92.0 byte(s)
a num_gaps
Number of input data gaps (a gap is defined as a predetermined number of range lines)
gaps 1 ul 4 byte(s)
b num_missing_lines
Number of missing lines, excluding data gaps
lines 1 ul 4 byte(s)
c range_samp_skip
Range sample skipping factor for raw data analysis
samples 1 ul 4 byte(s)
d range_lines_skip
Range lines skipping factor for raw data analysis
lines 1 ul 4 byte(s)
e calc_i_bias
Calculated I channel bias
- 1 fl 4 byte(s)
f calc_q_bias
Calculated Q channel bias
- 1 fl 4 byte(s)
g calc_i_std_dev
Calculated I channel standard deviation
- 1 fl 4 byte(s)
h calc_q_std_dev
Calculated Q channel standard deviation
- 1 fl 4 byte(s)
i calc_gain
Calculated I/Q gain imbalance
- 1 fl 4 byte(s)
j calc_quad
Calculated I/Q quadrature departure
- 1 fl 4 byte(s)
k i_bias_max
I bias upper bound
- 1 fl 4 byte(s)
l i_bias_min
I bias lower bound
- 1 fl 4 byte(s)
m q_bias_max
Q bias upper bound
- 1 fl 4 byte(s)
n q_bias_min
Q bias lower bound
- 1 fl 4 byte(s)
o gain_min
I/Q gain lower bound
- 1 fl 4 byte(s)
p gain_max
I/Q gain upper bound
- 1 fl 4 byte(s)
q quad_min
I/Q quadrature departure lower bound
- 1 fl 4 byte(s)
r quad_max
I/Q quadrature departure upper bound
- 1 fl 4 byte(s)
s i_bias_flag
I bias significance0 = I bias falls within acceptable range1 = I bias falls outside acceptable range
flag 1 BooleanFlag 1 byte(s)
t q_bias_flag
Q bias Significance0 = Q bias falls within acceptable range1 = Q bias falls outside acceptable range
flag 1 BooleanFlag 1 byte(s)
u gain_flag
I/Q Gain Significance0 = Gain falls within acceptable range1 = Gain falls outside acceptable range
flag 1 BooleanFlag 1 byte(s)
v quad_flag
I/Q Quadrature Departure Significance0 = Quadrature departure falls within acceptable range1 =Quadrature departure falls outside acceptable range
flag 1 BooleanFlag 1 byte(s)
w used_i_bias
I channel bias used for correction (may be different from measured value)
- 1 fl 4 byte(s)
x used_q_bias
Q channel bias used for correction(may be different from measured value)
- 1 fl 4 byte(s)
y used_gain
I/Q gain imbalance used for correction(may be different from measured value)
- 1 fl 4 byte(s)
z used_quad
I/Q quadrature departure used for correction(may be different from measured value)
- 1 fl 4 byte(s)
32 spare_3
Spare
- 1 SpareField 32 byte(s)
33 start_time
The following 2 parameters form a structure which is repeated twice. Once for values pertaining to MDS 1 and once for values pertaining to MDS 2.

If MDS 2 is not included in the product the fields in the second group are blanked (all values are set to zero).

- 2 start_timeStruct 2*20.0 byte(s)
a first_obt
On-board binary time of first input line processedLSB accurate to 15.26 ms. (Contained in two long integers)
- 2 ul 2*4 byte(s)
b first_mjd
Sensing time (MJD format) of first input line processedconverted from satellite binary time
MJD 1 mjd 12 byte(s)
34 parameter_codes
Following fields each contain room for 5 values

Only one value is filled for each for (IM) and (WV) modes. Two values are filled for (AP) mode (for MDS1 and MDS2). Five values are filled for (WS) and (GM) modes (for SS1 to SS5, respectively). Unused values are set to zero

- 1 parameter_codesStruct 120.0 byte(s)
a swst_code
Sampling Window Start time code of first processed line
code 5 us 5*2 byte(s)
b last_swst_code
Sampling Window Start time code of last processed line
code 5 us 5*2 byte(s)
c pri_code
Pulse Repetition Interval code
code 5 us 5*2 byte(s)
d tx_pulse_len_code
Tx pulse length
code 5 us 5*2 byte(s)
e tx_bw_code
Tx pulse bandwidth
code 5 us 5*2 byte(s)
f echo_win_len_code
Echo Window Length
code 5 us 5*2 byte(s)
g up_code
Upconverter Level - Upconverter gain set on the instrument
code 5 us 5*2 byte(s)
h down_code
Downconverter Level - Downconverter gain set on the instrument
code 5 us 5*2 byte(s)
i resamp_code
Resampling factor for echo data
code 5 us 5*2 byte(s)
j beam_adj_code
Beam adjustment delta
code 5 us 5*2 byte(s)
k beam_set_num_code
Antenna Beam Set Number
code 5 us 5*2 byte(s)
l tx_monitor_code
Auxiliary Tx Monitor Level
code 5 us 5*2 byte(s)
35 spare_4
Spare
- 1 SpareField 60 byte(s)
36 error_counters
Error counters

Each input line is analyzed for errors in the header using a majority polling technique. Errors are logged for each field of the header in the fields below.

- 1 error_countersStruct 40.0 byte(s)
a num_err_swst
Number of errors detected in Sampling Window start time field.
- 1 ul 4 byte(s)
b num_err_pri
Number of errors detected in PRI code field
- 1 ul 4 byte(s)
c num_err_tx_pulse_len
Number of errors detected in Tx pulse length field
- 1 ul 4 byte(s)
d num_err_tx_pulse_bw
Number of errors detected in Tx pulse bandwidth field.
- 1 ul 4 byte(s)
e num_err_echo_win_len
Number of errors detected in Echo Window Length field.
- 1 ul 4 byte(s)
f num_err_up
Number of errors detected in Upconverter Level field.
- 1 ul 4 byte(s)
g num_err_down
Number of errors detected in Downconverter Level field.
- 1 ul 4 byte(s)
h num_err_resamp
Number of errors detected in Resampling factor for echo data field.
- 1 ul 4 byte(s)
i num_err_beam_adj
Number of errors detected in Beam adjustment delta field.
- 1 ul 4 byte(s)
j num_err_beam_set_num
Number of errors detected in Antenna Beam Set Number field.
- 1 ul 4 byte(s)
37 spare_5
Spare
- 1 SpareField 26 byte(s)
38 image_parameters
Image Data Set parameters

Following fields each contain room for 5 values. Only one value is filled for each for IM and WV modes. Two values are filled (MDS1 and MDS2) if 2 MDSs are included in the product. Five values are filled for WS and GM modes (for SS1 to SS5, respectively). Unused values are set to zero

- 1 image_parametersStruct 270.0 byte(s)
a swst_value
Sampling Window Start time of first processed line
s 5 fl 5*4 byte(s)
b last_swst_value
Sampling Window Start time of last processed line
s 5 fl 5*4 byte(s)
c swst_changes
Number of Sample Window Start Time changes within a beam
- 5 ul 5*4 byte(s)
d prf_value
Pulse Repetition Frequency
Hz 5 fl 5*4 byte(s)
e tx_pulse_len_value
Tx pulse length
s 5 fl 5*4 byte(s)
f tx_pulse_bw_value
Tx pulse bandwidth
Hz 5 fl 5*4 byte(s)
g echo_win_len_value
Echo Window Length
s 5 fl 5*4 byte(s)
h up_value
Upconverter Level - Upconverter gain set on the instrument
dB 5 fl 5*4 byte(s)
i down_value
Downconverter Level - Downconverter gain set on the instrument
dB 5 fl 5*4 byte(s)
j resamp_value
Resampling factor
- 5 fl 5*4 byte(s)
k beam_adj_value
Beam adjustment delta
deg. 5 fl 5*4 byte(s)
l beam_set_value
Antenna Beam Set Number
- 5 us 5*2 byte(s)
m tx_monitor_value
Auxiliary Tx Monitor Level
- 5 fl 5*4 byte(s)
n rank
Number of PRI between transmitted pulse and return echo
- 5 ul 5*4 byte(s)
39 spare_6
Spare
- 1 SpareField 62 byte(s)
40 first_proc_range_samp
First processed input range sample, first sample is 1
samples 1 ul 4 byte(s)
41 range_ref
Range spreading loss reference range
m 1 fl 4 byte(s)
42 range_samp_rate
Range sampling rate
Hz 1 fl 4 byte(s)
43 radar_freq
Radar Frequency
Hz 1 fl 4 byte(s)
44 num_looks_range
Number of range looks
looks 1 us 2 byte(s)
45 filter_range
Matched filter window type

HAMMING or KAISER�� or NONE������

ascii 1 AsciiString 7 byte(s)
46 filter_coef_range
Window coefficient for range-matched filter
- 1 fl 4 byte(s)
47 bandwidth
Bandwidth

Following fields each contain room for 5 values. Only one value is filled for each for AP, IM, and WV modes. Five values are filled for WS and GM modes (for SS1 to SS5, respectively). Unused values are set to zero

- 1 bandwidthStruct 40.0 byte(s)
a look_bw_range
Range Look Bandwidth (null to null)
Hz 5 fl 5*4 byte(s)
b tot_bw_range
Total processed range bandwidth (null to null)
Hz 5 fl 5*4 byte(s)
48 nominal_chirp
Nominal Chirp

Following 2 parameters form a structure which is repeated 5 times (one set for each WS beam, SS1 first, to SS5 last -- only one set of values given for narrow swath images)

- 5 nominal_chirpStruct 5*32.0 byte(s)
a nom_chirp_amp
4 nominal chirp amplitude coefficients
-, s-1, s-2, s-3 4 fl 4*4 byte(s)
b nom_chirp_phs
4 nominal chirp phase coefficients
cycles,Hz,Hz/s,Hz/s2 4 fl 4*4 byte(s)
49 spare_7
Spare
- 1 SpareField 60 byte(s)
50 num_lines_proc
Number of input lines processed
lines 1 ul 4 byte(s)
51 num_look_az
Number of Azimuth Looks
looks 1 us 2 byte(s)
52 look_bw_az
Azimuth Look Bandwidth (null to null)

(null to null)

Hz 1 fl 4 byte(s)
53 to_bw_az
Processed Azimuth bandwidth

(null to null)

Hz 1 fl 4 byte(s)
54 filter_az
Matched filter window type

HAMMING or KAISER�� or NONE������

ascii 1 AsciiString 7 byte(s)
55 filter_coef_az
Window coefficient for azimuth-matched filter
- 1 fl 4 byte(s)
56 az_fm_rate
3 co-efficients for Azimuth FM rate

Azimuth FM rate = C0 + C1(tSR-t0) + C2(tSR - t0)2 tSR = 2 way slant range time

Hz/sHz/s2Hz/s3 3 fl 3*4 byte(s)
57 ax_fm_origin
2 way slant range time origin (t0) for Azimuth FM rate calculation
ns 1 fl 4 byte(s)
58 dop_amb_conf
Doppler Centroid Ambiguity Confidence MeasureValue between 0 and 1, 0 = poorest confidence, 1= highest confidence
- 1 fl 4 byte(s)
59 spare_8
Spare
- 1 SpareField 68 byte(s)
60 calibration_factors
Calibration factors

The following 2 parameters form a structure which is repeated twice. Once for values pertaining to MDS 1 and once for values pertaining to MDS 2. If MDS 2 is not included in the product the fields in the second group are set to zero

- 2 calibration_factorsStruct 2*8.0 byte(s)
a proc_scaling_fact
Processor scaling factor
- 1 fl 4 byte(s)
b ext_cal_fact
External Calibration Scaling Factor (mode/swath/polarization dependent)
- 1 fl 4 byte(s)
61 noise_estimation
Noise Estimation

Following fields each contain room for 5 values. Five values are filled for WS and GM modes (for SS1 to SS5, respectively). Up to 5 values may be provided for IM mode, each one is a separate noise estimate. For AP mode, up to 4 values may be provided in the order: first estimate for MDS1, second estimate for MDS1, first estimate for MDS2, second estimate for MDS2. For WV, there is one estimate provided.

- 1 noise_estimationStruct 40.0 byte(s)
a noise_power_corr
Noise power correction factors
- 5 fl 5*4 byte(s)
b num_noise_lines
Number of noise lines used to calculate factors
- 5 ul 5*4 byte(s)
62 spare_9
Spare
- 1 SpareField 64 byte(s)
63 spare_10
Spare
- 1 SpareField 12 byte(s)
64 output_statistics
Output Data Statistics

The following 4 parameters form a structure which is repeated twice. Once for values pertaining to MDS 1 and once for values pertaining to MDS 2. If MDS 2 is not included in the product the fields in the second group are set to zero.

- 2 output_statisticsStruct 2*16.0 byte(s)
a out_mean
Output data mean Magnitude for detected products, real sample mean for SLC products
- 1 fl 4 byte(s)
b out_imag_mean
Output imaginary data mean Used for SLC products only (set to zero otherwise)
- 1 fl 4 byte(s)
c out_std_dev
Output data standard deviation Magnitude std. dev. for detected products, real sample std. dev. for SLC products
- 1 fl 4 byte(s)
d out_imag_std_dev
Output imaginary data standard deviation Used for SLC products only (set to zero otherwise)
- 1 fl 4 byte(s)
65 avg_scene_height_ellpsoid
Average scene height above ellpsoid used for processing
m 1 fl 4 byte(s)
66 spare_11
Spare
- 1 SpareField 48 byte(s)
67 echo_comp
Compression Method used for echo samples

FBAQ, S&M��, NONE

ascii 1 AsciiString 4 byte(s)
68 echo_comp_ratio
Compression Ratio for echo samples8/4, 8/3, 8/2, or 8/8
ascii 1 AsciiString 3 byte(s)
69 init_cal_comp
Compression Method used for initial calibration samples

FBAQ, S&M��, NONE

ascii 1 AsciiString 4 byte(s)
70 init_cal_ratio
Compression Ratio for initial calibration samples8/4, 8/3, 8/2, or 8/8
ascii 1 AsciiString 3 byte(s)
71 per_cal_comp
Compression Method used for periodic calibration samples

FBAQ, S&M��, NONE

ascii 1 AsciiString 4 byte(s)
72 per_cal_ratio
Compression Ratio for periodic calibration samples8/4, 8/3, 8/2, or 8/8
ascii 1 AsciiString 3 byte(s)
73 noise_comp
Compression Method used for noise samples

FBAQ, S&M��, NONE

ascii 1 AsciiString 4 byte(s)
74 noise_comp_ratio
Compression Ratio for noise samples8/4, 8/3, 8/2, or 8/8
ascii 1 AsciiString 3 byte(s)
75 spare_12
Spare
- 1 SpareField 64 byte(s)
76 beam_overlap
Number of slant range samples in beam merging

One value per merge region (1-2, 2-3, 3-4, 4-5). This parameter is equivalent to N in the following beam merging formula: xmerged(n) = (1 - (n/N)P * xnear(n) + ((n/N)P * xfar(n)

- 4 ul 4*4 byte(s)
77 beam_param
Beam merge algorithm parameter used for beam merging

One value per merge region (1-2, 2-3, 3-4, 4-5). This parameter is equivalent to P in the above beam merging forumla, and different values have the following affect: P = 1, linear weighting of the two beams (near and far). P = -1, (which represents infinity in the beam merging formula) only near beam contributes to the merged one P = 0, only far beam contributes to the merged one P > 1, near beam is favoured 0 < P < 1, far beam is favoured.

- 4 fl 4*4 byte(s)
78 lines_per_burst
Number of lines per burst for this image.

5 values for beams SS1 to SS5 in WS and GM modes. Two values for AP mode, all others set to zero.

lines 5 ul 5*4 byte(s)
79 time_first_SS1_echo
Time of first SS1 Echo Source Packet
mjd 1 mjd 12 byte(s)
80 spare_13
Spare
- 1 SpareField 16 byte(s)
81 orbit_state_vectors
Orbit State Vectors Information

The following 7 parameters form a structure which is repeated 5 times, thus allowing the inclusion of up to 5 orbit state vectors which span the scene (or slice) to which this ADSR pertains.

- 5 orbit_state_vectorsStruct 5*36.0 byte(s)
a state_vect_time_1
Time of state vector
MJD 1 mjd 12 byte(s)
b x_pos_1
X position in Earth fixed reference frame
10 -2m 1 sl 4 byte(s)
c y_pos_1
Y position in Earth fixed reference frame
10 -2m 1 sl 4 byte(s)
d z_pos_1
Z position in Earth fixed reference frame
10 -2m 1 sl 4 byte(s)
e x_vel_1
X velocity relative to Earth fixed reference frame
10 -5m/s 1 sl 4 byte(s)
f y_vel_1
Y velocity relative to Earth fixed reference frame
10 -5m/s 1 sl 4 byte(s)
g z_vel_1
Z velocity relative to Earth fixed reference frame
10 -5m/s 1 sl 4 byte(s)
82 spare_14
Spare
- 1 SpareField 64 byte(s)
83 slant_range_time
2-way slant range time origin (t0)
ns 1 fl 4 byte(s)
84 dop_coef
Doppler centroid coefficients as a function of slant range time: D0, D1, D2, D3, and D4.

Where Doppler Centroid = D0 + D1(tSR-t0) + D2(tSR-t0)2 + D3(tSR-t0)3 + D4(tSR-t0)4

HzHz/sHz/s2Hz/s3Hz/s4 5 fl 5*4 byte(s)
85 dop_conf
Doppler Centroid Confidence Measure. Value between 0 and 1, 0 = poorest confidence, 1= highest confidence
- 1 fl 4 byte(s)
86 dop_conf_below_thresh
Doppler Centroid Confidence below threshold flag. 0=confidence above threshold, centroid calculated from data; 1=confidence below threshold, centroid calculated from orbit.
- 1 uc 1 byte(s)
87 spare_15
Spare
- 1 SpareField 13 byte(s)
88 chirp_width
3-dB pulse width of chirp replica cross-correlation function between extract chirp and nominal chirp
samples 1 fl 4 byte(s)
89 chirp_sidelobe
First side lobe level of chirp replica cross-correlation function between reconstructed chirp and nominal chirp
dB 1 fl 4 byte(s)
90 chirp_islr
ISLR of chirp replica cross-correlation function between reconstructed chirp and nominal chirp
dB 1 fl 4 byte(s)
91 chirp_peak_loc
Peak location of cross correlation function between reconstructed chirp and nominal chirp
samples 1 fl 4 byte(s)
92 chirp_power
Chirp power
- 1 fl 4 byte(s)
93 eq_chirp_power
Equivalent Chirp power
dB 1 fl 4 byte(s)
94 rec_chirp_exceeds_qua_thres
Reconstructed chirp exceeds quality thresholds 0=Reconstructed chirp does not meet quality thresholds 1=Reconstructed chirp does meet quality thresholds
- 1 uc 1 byte(s)
95 ref_chirp_power
Reference Chirp power
dB 1 fl 4 byte(s)
96 norm_source
Normalisation source REPLICA REF0000 EQV0000 or NONE000 ( if normalisation not applied )
ascii 1 AsciiString 7 byte(s)
97 spare_16
Spare
- 1 SpareField 4 byte(s)
98 cal_info
Calibration pulse information

The following 4 parameters form a structure that is repeated 32 times (once for each row). Each repetition consists of a total of 11 measurements of 4 different types as described below.

- 32 cal_infoStruct 32*44.0 byte(s)
a max_cal
Max of Cal pulses 1, 2, and 3 amplitude
- 3 fl 3*4 byte(s)
b avg_cal
Average of Cal pulse 1, 2, and 3 amplitude over the 3 dB on either side of the max amplitude
- 3 fl 3*4 byte(s)
c avg_val_1a
Average of Cal pulse 1A over the sample window
- 1 fl 4 byte(s)
d phs_cal
Extracted phase for calibration pulse 1, 1A, 2, and 3
degrees 4 fl 4*4 byte(s)
99 spare_17
Spare
- 1 SpareField 16 byte(s)
100 first_line_time
Zero Doppler Time at first line of imagette
MJD 1 mjd 12 byte(s)
101 first_line_tie_points
Imagette First Line Tie Points
- 1 first_line_tie_pointsStruct 60.0 byte(s)
a range_samp_nums
Range sample number Gives the range location of the grid points. First range sample is 1, is M (includes zero filled samples)
- 3 ul 3*4 byte(s)
b slant_range_times
2 way slant range time to range sample
ns 3 fl 3*4 byte(s)
c inc_angles
Incidence Angle at range sample
deg. 3 fl 3*4 byte(s)
d lats
geodetic latitude of range sample (positive north)
(1e-6) degrees 3 GeoCoordinate 3*4 byte(s)
e longs
geodetic longitude of range sample (positive east)
(1e-6) degrees 3 GeoCoordinate 3*4 byte(s)
102 mid_line_time
Zero Doppler Time at centre line of imagette
MJD 1 mjd 12 byte(s)
103 mid_range_line_nums
Range line number of the center range line
- 1 ul 4 byte(s)
104 mid_line_tie_points
Imagette Mid Line Tie Points
- 1 mid_line_tie_pointsStruct 60.0 byte(s)
a range_samp_nums
Range sample number Gives the range location of the grid points. First range sample is 1, is M (includes zero filled samples)
- 3 ul 3*4 byte(s)
b slant_range_times
2 way slant range time to range sample
ns 3 fl 3*4 byte(s)
c inc_angles
Incidence Angle at range sample
deg. 3 fl 3*4 byte(s)
d lats
geodetic latitude of range sample (positive north)
(1e-6) degrees 3 GeoCoordinate 3*4 byte(s)
e longs
geodetic longitude of range sample (positive east)
(1e-6) degrees 3 GeoCoordinate 3*4 byte(s)
105 last_line_time
Zero Doppler Time at last line of imagette
MJD 1 mjd 12 byte(s)
106 last_line_num
Range line number of the last range line
- 1 ul 4 byte(s)
107 last_line_tie_points
Imagette Last Line Tie Points
- 1 last_line_tie_pointsStruct 60.0 byte(s)
a range_samp_nums
Range sample number Gives the range location of the grid points. First range sample is 1, is M (includes zero filled samples)
- 3 ul 3*4 byte(s)
b slant_range_times
2 way slant range time to range sample
ns 3 fl 3*4 byte(s)
c inc_angles
Incidence Angle at range sample
deg. 3 fl 3*4 byte(s)
d lats
geodetic latitude of range sample (positive north)
(1e-6) degrees 3 GeoCoordinate 3*4 byte(s)
e longs
geodetic longitude of range sample (positive east)
(1e-6) degrees 3 GeoCoordinate 3*4 byte(s)
108 swst_offset
Wave cell SWST offset

From centre of the sub-swath to start of imagette. 208 ns increments

ns 1 fl 4 byte(s)
109 ground_range_bias
Wave cell Ground range bias

From centre of the sub-swath to the centre of the imagette (Ground range, km)

km 1 fl 4 byte(s)
110 elev_angle_bias
Wave cell elevation angle bias

From centre of the sub-swath elevation to the centre of the imagette (deg)

deg 1 fl 4 byte(s)
111 imagette_range_len
Imagette length in range (m)
m 1 fl 4 byte(s)
112 imagette_az_len
Imagette length in azimuth (m)
m 1 fl 4 byte(s)
113 imagette_range_res
Nominal Imagette resolution in slant range (m)
m 1 fl 4 byte(s)
114 ground_res
Nominal resolution in ground range
m 1 fl 4 byte(s)
115 imagette_az_res
Nominal Imagette resolution in azimuth (m)
m 1 fl 4 byte(s)
116 platform_alt
Altitude (platform to ellipsoid) in metres (centre of wave cell)
m 1 fl 4 byte(s)
117 ground_vel
Ground Velocity. w.r.t moving earth
m/s 1 fl 4 byte(s)
118 slant_range
Range to centre of imagette (m)

From platform to target

m 1 fl 4 byte(s)
119 cw_drift
CW signal drift
- 1 fl 4 byte(s)
120 wave_subcycle
Wave sub-cycle (1 or 2) of this wave cell
- 1 us 2 byte(s)
121 earth_radius
Earth Radius at imagette center sample
m 1 fl 4 byte(s)
122 sat_height
Satellite distance to earth center
m 1 fl 4 byte(s)
123 first_sample_slant_range
Distance from satellite to first range pixel in the full SLC image
m 1 fl 4 byte(s)
124 spare_18
Spare
- 1 SpareField 12 byte(s)
125 elevation_pattern
Antenna Elevation Pattern
- 1 elevation_patternStruct 132.0 byte(s)
a slant_range_time
2 way slant range times
ns 11 fl 11*4 byte(s)
b elevation_angles
Corresponding elevation angles
degrees 11 fl 11*4 byte(s)
c antenna_pattern
Corresponding two-way antenna elevation pattern values
dB 11 fl 11*4 byte(s)
126 spare_19
Spare
- 1 SpareField 14 byte(s)
Record Length : 3959

DS_NAME : Wave Mode processing parameters



Format Version 114.0  

Note: the Spectrum SR/GR parameters and the Antenna Elevation parameters pertain to the creation of the Cross Spectra ( slant range to ground range conversion and antenna elevation correction ) . These operations have NOT been applied to the SLC imagette contained within the WVI product . They are applied during the computation of the cross spectra.

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry