| id | field name | definition |
|---|
| 0 | starttime |
| binary time | size: 12 |
|---|
Start date and time of the AEL-PRO profile covered by the present DSR. This is the centroid time of the first measurement of the profile.
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"
|
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| 1 | seconds |
| binary uint32 | size: 4 |
|---|
seconds since start of day
unit: "s"
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| 2 | microseconds |
| binary uint32 | size: 4 |
|---|
microseconds since start of second
unit: "1e-6 s"
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| 1 | overall_quality |
| binary uint8 | size: 1 |
|---|
|
Currently the FM_ADS flag setting is copied; the FM results are input to the AEL-PRO. More sophisticated setting will be added in the next version.
|
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| 2 | starting_cost_function_value_pass1 |
| binary double | size: 8 |
|---|
|
Value of the OE cost function corresponding to the initial guess for the low-resolution pass.
|
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| 3 | ending_cost_function_value_pass1 |
| binary double | size: 8 |
|---|
|
Value of the OE cost function corresponding to the converged minimum found for the low-resolution pass
|
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| 4 | number_of_iterations_pass1 |
| binary int32 | size: 4 |
|---|
|
Number of optimal estimation iterations on observation level data
|
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| 5 | measurement_ael_pro_pcd |
| binary array[dim_0] |
|---|
dim_0: $num_meas_max_brc
| binary record | size: 1076 |
|---|
Structure containing AEL-PRO PCD information for the measurements of the BRC in the Mie bins
| id | field name | definition |
|---|
| 0 | starting_cost_function_value_pass2 |
| binary double | size: 8 |
|---|
|
Value of the OE cost function corresponding to the initial guess for the high-resolution pass
|
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| 1 | ending_cost_function_value_pass2 |
| binary double | size: 8 |
|---|
|
Value of the OE cost function corresponding to the converged minimum found for the high-resolution pass
|
|
| 2 | number_of_iterations_pass2 |
| binary int32 | size: 4 |
|---|
|
Number of optimal estimation iterations on observation level data
|
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| 3 | height_bin_ael_pro_pcd |
| binary array[24] | size: 1056 |
|---|
| binary record | size: 44 |
|---|
Structure containing AEL-PRO PCD information for the Mie bins
| id | field name | definition |
|---|
| 0 | extinction_variance |
| binary double | size: 8 |
|---|
Variance of the particle extinction. Missing value: -1e+06.
unit: "10^-6 m^-1"
|
|
| 1 | lr_variance |
| binary double | size: 8 |
|---|
Variance of the particle lidar ratio. Missing value: -1.
unit: "sr"
|
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| 2 | ber_variance |
| binary double | size: 8 |
|---|
|
Variance of the particle backscatter-to-extinction ratio. Missing value: -1.
|
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| 3 | sr_variance |
| binary double | size: 8 |
|---|
|
Variance of the particle scattering ratio. Missing value: -1.
|
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| 4 | particle_effective_area_radius_variance |
| binary double | size: 8 |
|---|
|
Variance of the particel effective area radius.
|
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| 5 | quality_index |
| binary int32 | size: 4 |
|---|
|
Index describing quality of retrieval; the first 6 bits are used: Bit 1 No retrieval (e.g. no valid data) Bit 2 High value of Chi_sq in optimal estimation minimization (obs. level pass 1) Bit 3 High level of Chi_sq in optimal estimation minimization (meas. level pass 2) Bit 4 Maximum number of iterations reached (obs. level pass 1) Bit 5 Maximum number of iterations reached (meas. level pass 2) Bit 6 Low SNR in retrieved extinction
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