Use of Observation

Background Information

ODBusage2.pdf Anne Fouilloux's (ECMWF) review presentation about ODB
http://apps.ecmwf.int/odbgov ECMWF's ODB governance pages - useful for looking up ODB and BUFR definintions
http://www.ecmwf.int/research/ifsdocs/CY28r1/pdf_files/odb.pdf The ODB bible - Sami Saarinen's ODB user guide (2004)
http://www.rclace.eu/File/DataAssimilation/2007/laceobspp.pdf Sandor's document about observation dataflow in ALADIN

Observation type

The observation types used by Harmonie (upper-air) data assimilation are defined in scr/include.ass.

SYNOP

By default all SYNOP observation types (including SHIP) are used.

export SYNOP_OBS=1             # All synop

To blacklist SYNOP observations add blacklisted "ODB observation type/ASCII type/ODB code type/ODB variable number/station identifier/date to blacklist from" to nam/LISTE_NOIRE_DIAP. For example to blacklist 10m winds from Valentia Automatic SYNOP (03953) from the 10th of November 2012 enter the following line to LISTE_NOIRE_DIAP:

 1 SYNOP       14  41 03953    10112012

(Note: please don't add Valentia to your blacklist - the observations from there are pretty good!)

For further information on ODB observation types, code types, variable numbers etc see the ECMWF ODB governance page here: http://apps.ecmwf.int/odbgov/obstype/

SHIP

See information provided above on SYNOP observations.

BUOY

By default all BUOY observation types are used.

export BUOY_OBS=1              # Buoy

To blacklist BUOY observations add blacklisted "ODB observation type/ASCII type/ODB code type/ODB variable number/station identifier/date to blacklist from" to nam/LISTE_NOIRE_DIAP. For example to blacklist surface temperatures from BUOY M5 (62094) from the 10th of November 2012 enter the following line to LISTE_NOIRE_DIAP:

 4 BUOY        165  11 62094    10112012

(Note: please don't add M4 to your blacklist - the observations from there are pretty good too!)

For further information on ODB observation types, code types, variable numbers etc see the ECMWF ODB governance page here: http://apps.ecmwf.int/odbgov/obstype/

AIRCRAFT

By default all AIRCRAFT observation types (including AMDAR, AIREP, ACARS) are used.

export AIRCRAFT_OBS=1          # AMDAR, AIREP, ACARS

Below are lines added by Xiaohua to the DMI dka37 LISTE_NOIRE_DIAP file to exclude problematic aircraft observations:

2 AMDAR 144 2 EU0028 08292013
2 AMDAR 144 2 EU0092 01042013
2 AMDAR 144 2 EU0079 01052013
2 AMDAR 144 2 EU0097 01052013
2 AMDAR 144 2 EU0107 01052013
2 AMDAR 144 2 EU0033 01062013
2 AMDAR 144 2 EU0118 01062013
2 AMDAR 144 2 EU0112 07052013
2 AMDAR 144 2 EU1110 08122013
2 AMDAR 144 2 EU0074 08122013

TEMP

By default all TEMP observation types are used.

export TEMP_OBS=1              # TEMP, TEMPSHIP

PILOT

By default all PILOT observation types are used.

export PILOT_OBS=1             # Pilot, Europrofiler

AMSUA

By default all AMSUA observation types are not used.

export AMSUA_OBS=0             # AMSU-A

To use locally received AMSUA data provided by EUMETCast set ATOVS_SOURCE to local in scr/include.ass:

export ATOVS_SOURCE=mars       # local: EUMETCast; 
                               # mars: data from MARS
                               # hirlam: hirlam radiance template

AMV (aka SATOB, GEOWIND)

For AMVs there is a HOW-TO page.