| File | K5_20231008013527_000010_55609_D_ES02_HH_SCS_B_L1A.h5 |
|---|---|
| Acquisition mode | STANDARD |
| Metric | Measured value | Threshold | Result |
|---|---|---|---|
| Zero pixels | 14,159 / 309,797,760 (0.0046%) | PASS < 0.1% WARN < 0.5% (of all pixels) |
PASS |
| Unclassified (unknown) | 14,051 / 14,159 (99.24%) | PASS < 1% WARN < 5% (of zero pixels; not counted in overall result) |
FAIL |
SLC amplitude shown in dB (10·log₁₀(I²+Q²)). Brighter areas have stronger backscatter (urban·mountainous), darker areas weaker backscatter (water·flat terrain). Used as the background image for all subsequent quality assessments.
Grid lines (red) of the regularly spaced DEM grid projected into SLC coordinates via range-Doppler transformation. Shows how a regular ground grid bends in the SLC image depending on terrain and acquisition geometry. Because drawing every DEM grid line would be too dense to read, lines are thinned at a fixed interval depending on acquisition mode (every 4 cells for STANDARD, every 6 for WIDE SWATH). This step visually checks that the DEM→SLC coordinate transformation (co-registration) is correct before incidence angles and classification are computed; if the grid lines are misaligned with terrain features or abnormally distorted, the co-registration has failed and subsequent results cannot be trusted.
Per-pixel incidence angle (degrees) computed from the co-registered DEM. It should normally increase along range from near range (small angles) to far range (large angles), and also reflects local variations due to terrain. (Hover to see per-pixel values)