SOLab product specification

From

Current document describes the format of the new product. Please also refer to the short summary of the CF convention prepared from the original source CF convention.

Contents 1 Product design 1.1 Product ID 1.2 Filename 1.3 NetCDF structure 1.3.1 Header 1.3.2 Variables

Product design

Given:

lat, lon, time, 6 parameters: Q – water vapor, W – cloud liquid, Vhf – wind speed (high frequency algorithm), Vlf – wind speed (low frequency algorithm), T – temperature, tau - atmospheric absorption at 10.65 GHz. This is for one swath, and we have 14 ascending and 14 descending swaths per day. Time is for a scan, pixels in scan are always 196, number of scans per swath is about 2000 and this varies from swath to swath.

Product ID

SOLAB_AMSRE_L2_NN

<VENDOR_ID>_<INSTRUMENT_ID>_<PRODUCT_LEVEL>_<ALGORITHM>

Filename

There are several patterns for filename convention. For example, all ASCAT files use next convention:

<INSTRUMENT_ID>_<PRODUCT_TYPE>_<PROCESSING_LEVEL>_<SPACECRAFT_ID>_ _<SENSING_START>_<SENSING_END>_<PROCESSING_MODE>_<DISPOSITION_MODE>_<PROCESSING_ TIME>

Therefore, filename format of the developing SOLab product may use the next convention

SOLAB_AMSRE_L2_NN_yyyymmdd_nnn_i_vv.nc

• yyyymmdd- year, month and day
• nnn - orbit number
• i - orbit node: A or D
• vv - version (v1, v2...)

NetCDF structure

Header

Attribute	Value
NC_GLOBAL.title	full product name
NC_GLOBAL.title_short_name	product identifier
NC_GLOBAL.institution	SOLab/RSHU
NC_GLOBAL.source	satellite AMSR-E
NC_GLOBAL.history	N/A
NC_GLOBAL.references	html page with product specification, should be on SOLab website
NC_GLOBAL.comment
NC_GLOBAL.Conventions	CF-1.6
NC_GLOBAL.pixel_size_on_horizontal	10km
NC_GLOBAL.processing_level	L2
NC_GLOBAL.granule_name	variable
NC_GLOBAL.start_date	variable
NC_GLOBAL.start_time	variable
NC_GLOBAL.stop_date	variable
NC_GLOBAL.stop_time	variable
NC_GLOBAL.creation_date	variable
NC_GLOBAL.creation_time	variable

Variables

Variable	Attributes
latitude	long_name: latitude units: degrees_north standard_name: latitude
longitude	long_name: longitude units: degrees_east standard_name: longitude
time	long_name: time units: s since 1993-01-01 00:00:0.0 standard_name: time
atmosphere_water_vapor_content	long_name: units: kg m-2 standard_name: scale_factor: add_offset: _FillValue: coordinates: latitude longitude
atmosphere_cloud_liquid_water_content	long_name: units: kg m-2 standard_name: scale_factor: add_offset: _FillValue: coordinates: latitude longitude
wind_speed	long_name: wind speed units: m s-2 standard_name: wind speed scale_factor: add_offset: _FillValue: coordinates: latitude longitude
sea_surface_temperature	long_name: sea surface temperature units: degree of Celcium standard_name: sea surface temperature scale_factor: add_offset: _FillValue: coordinates: latitude longitude