S4-L2-FCS-CMA
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of S4-L2-FCS-CMA data.
field name |
type |
dimensions |
unit |
description |
|---|---|---|---|---|
scan_subindex |
int16 |
{time} |
pixel index (0-based) within the scanline |
|
cycle_index |
int32 |
repeat cycle number within the day |
||
datetime |
double |
{time} |
[seconds since 2000-01-01] |
time of the measurement |
datetime_length |
double |
[s] |
measurement duration |
|
latitude |
float |
{time} |
[degree_north] |
pixel center latitude |
longitude |
float |
{time} |
[degree_east] |
pixel center longitude |
latitude_bounds |
float |
{time, 4} |
[degree_north] |
latitudes of pixel boundary |
longitude_bounds |
float |
{time, 4} |
[degree_east] |
longitudes of pixel boundary |
validity |
int8 |
{time} |
continuous quality descriptor, varying between 0 (no data) and 100 (full quality data) |
|
solar_zenith_angle |
float |
{time} |
[degree] |
zenith angle of the Sun at the ground pixel location; angle measured away from the vertical |
solar_azimuth_angle |
float |
{time} |
[degree] |
azimuth angle of the Sun at the ground pixel location; angle measured clockwise from North |
viewing_zenith_angle |
float |
{time} |
[degree] |
zenith angle of the satellite at the ground pixel location; angle measured away from the vertical |
viewing_azimuth_angle |
float |
{time} |
[degree] |
azimuth angle of the satellite at the ground pixel location; angle measured clockwise from North |
cloud_free_fraction |
float |
{time} |
[] |
fraction of pixels classified as cloud free |
cloud_contaminated_fraction |
float |
{time} |
[] |
fraction of pixels classified as cloud contaminated |
cloud_filled_fraction |
float |
{time} |
[] |
fraction of pixels classified as cloud filled |
desert_dust_fraction |
float |
{time} |
[] |
fraction of pixels classified as desert dust |
snow_ice_fraction |
float |
{time} |
[] |
fraction of pixels classified as snow or ice |
volcanic_ash_fraction |
float |
{time} |
[] |
fraction of pixels classified as volcanic ash |
index |
int32 |
{time} |
zero-based index of the sample within the source product |
Ingestion options
The table below lists the available ingestion options for S4-L2-FCS-CMA products.
option name |
legal values |
description |
|---|---|---|
band |
NIR |
ingest the cloud mask in the UV/VIS (default) or NIR (band=NIR) |
Mapping description
The table below details where and how each variable was retrieved from the input product.
field name |
mapping description |
|
|---|---|---|
scan_subindex |
description |
the scanline and ground_pixel dimensions are collapsed into a temporal dimension; the index of the pixel within the scanline is computed as the index on the temporal dimension modulo the number of pixels per scanline |
cycle_index |
path |
/@repeat_cycle_in_day[0] |
description |
parsed from the string attribute repeat_cycle_in_day |
|
datetime |
path |
/@time_reference_days_since_1950, /PRODUCT/delta_time[] |
description |
time reference converted from days since 1950-01-01 to seconds since 2000-01-01 (using 86400 seconds per day) and delta_time added |
|
datetime_length |
path |
/PRODUCT/delta_time[] |
description |
delta_time[num_ground_pixels] - delta_time[0] |
|
latitude |
path |
/PRODUCT/latitude[] |
longitude |
path |
/PRODUCT/longitude[] |
latitude_bounds |
path |
/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/latitude_bounds[] |
longitude_bounds |
path |
/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/longitude_bounds[] |
validity |
path |
/PRODUCT/qa_value |
solar_zenith_angle |
path |
/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/solar_zenith_angle[] |
solar_azimuth_angle |
path |
/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/solar_azimuth_angle[] |
viewing_zenith_angle |
path |
/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/viewing_zenith_angle[] |
viewing_azimuth_angle |
path |
/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/viewing_azimuth_angle[] |
cloud_free_fraction |
condition |
band unset |
path |
/PRODUCT/cma_cloud_free_psf_mean[] |
|
condition |
band=NIR |
|
path |
/PRODUCT_NIR/cma_cloud_free_psf_mean[] |
|
cloud_contaminated_fraction |
condition |
band unset |
path |
/PRODUCT/cma_cloud_contaminated_psf_mean[] |
|
condition |
band=NIR |
|
path |
/PRODUCT_NIR/cma_cloud_contaminated_psf_mean[] |
|
cloud_filled_fraction |
condition |
band unset |
path |
/PRODUCT/cma_cloud_filled_psf_mean[] |
|
condition |
band=NIR |
|
path |
/PRODUCT_NIR/cma_cloud_filled_psf_mean[] |
|
desert_dust_fraction |
condition |
band unset |
path |
/PRODUCT/cma_desert_dust_psf_mean[] |
|
condition |
band=NIR |
|
path |
/PRODUCT_NIR/cma_desert_dust_psf_mean[] |
|
snow_ice_fraction |
condition |
band unset |
path |
/PRODUCT/cma_snow_ice_psf_mean[] |
|
condition |
band=NIR |
|
path |
/PRODUCT_NIR/cma_snow_ice_psf_mean[] |
|
volcanic_ash_fraction |
condition |
band unset |
path |
/PRODUCT/cma_volcanic_ash_psf_mean[] |
|
condition |
band=NIR |
|
path |
/PRODUCT_NIR/cma_volcanic_ash_psf_mean[] |
|