SOLab product specification

From

Revision as of 10:27, 11 June 2013 (view source) Mag (Talk | contribs) (→Header) ← Older edit		Revision as of 09:18, 14 June 2013 (view source) Mag (Talk | contribs) (→Header) Newer edit →
Line 41:		Line 41:
	|SOLab/RSHU		|SOLab/RSHU
	|-		|-
-	|NC_GLOBAL.creator_url???	+	|NC_GLOBAL.creator_url
	|http://solab.rshu.ru/		|http://solab.rshu.ru/
	|-		|-

---

Revision as of 09:18, 14 June 2013

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.creator_url	http://solab.rshu.ru/
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_hf	long_name: wind speed high frequency units: m s-2 standard_name: wind speed scale_factor: add_offset: _FillValue: coordinates: latitude longitude
wind_speed_lf	long_name: wind speed low frequency 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
atmospheric_absorption_at_11GHz	long_name: atmospheric absorption at 11GHz units: standard_name: scale_factor: add_offset: _FillValue: coordinates: latitude longitude