For further information on WMO Intercomparisons please go to the Commission for  Instruments and Methods of Observations Programme web page: http://www.wmo.int/pages/prog/www/IMOP/intercomparisons.html  

UPCOMING/CURRENT INTERCOMPARISONS

LUAMI (Lindenberg Upper_Air Methods Intercomparison) Campaign in Lindenberg, Germany, 3-24 November 2008
At the meeting, just held 2-6 June, of the CIMO ET on Upper-air Systems Intercomparisons and IOC on Upper-air Systems Intercomparisons in  Payerne, Switzerland, it was decided that WMO would support an Intercomparison Campaign to be held 3-24 November this year in Lindenberg Germany.

Seven HMEI Member Radiosonde manufacturers attended this meeting (for which there will be short HMEI report published on our website next month). During the meeting the Lindenberg Upper-Air Methods Intercomparison was addressed. Discussion focused, in part, on the concern about the short notice given to manufacturers for the organization of the Intercomparison. The Intercomparison is a GRUAN initiative which wishes to look at instrumentation suitable for GRUAN stations.

Three HMEI Members manufacturers have currently confirmed they will participate in the Intercomparison: Graw; Leosphere; and Vaisala.   

The brochure for the LUAMI Campaign is available here. Any manufacturers wishing to be involved in this campaign please contact Franz Immler at: franz.immler@dwd.de, with a cc email please to HMEI at hmei@wmo.int.

WMO Combined Intercomparison of Thermometer Screens/Shields in Conjunction with Humidity Measuring Instruments
Ghardaïa, Algeria, beginning 2007 – 2008  
The qquestionnaire for potential participants is available from the link above. The deadline for the WMO Secretariat reception of the questionnaires is 17 April 2006.

HMEI Members with instruments selected for participation  this Intercomparison from the recommendation of HMEI in are:
Metspec - UK
R. M. Young - USA
Sutron Corp. - USA
Vector Instruments (Windspeed Ltd.) - UK

HMEI members with instruments selected from Met Agencies recommendation are:
CAE - Italy
Casell - UK
Lambrecht - Germany
Meteolabor - Switzerland
Rotronic - Switzerland
Vaisala - Finland

Out of 36 instruments in total proposed only 18 were accepted due to the space restrictions on the test site.
For a full list of accepted instrument please go to: http://www.wmo.int/pages/prog/www/IMOP/intercomparisons.html

WMO Field Intercomparison of Rainfall Intensity Instruments, Vigna di Valle, Italy, mid 2007 – mid 2008This WMO Field Intercomparison of RI Gauges follows on from the WMO Laboratory Intercomparisons of RI Gauges in 2005. 
Out of 50 instruments proposed, 24 were accepted for the Intercomparison, 16 of these are from HMEI Members.

HMEI Members with Instruments selected for this Intercomparison are:
ATTEX PVK - two instruments
CAE S.p.A. - one instrument
Davis Instruments -  one instrument
Eigenbrodt -  one instrument
Environmental Measurements - one instrumnt
GEONOR AS - one instrumente
LSI LASTEM -  one instrument
METEOSERVIS v.o.s.   -  one instrument
McVan Instruments - two instruments
MPS System -  one instrument
OTT - two instruments
Précis-Mecanique Exploitation -  one instrument
SIAP+MICROS Srl -  one instrument
THIES - two instruments
Vaisala OJY - three instruments

Other manufacturers each with an instrument selected were:
ETG s.r.l.
EWS Ltd
KNMI
LUFFT
PAAR
AS "MIRRAD"

Some of the instruments selected were suggested by Met Services, others were selected as a result of suggestion from HMEI.

Please go to the appropriate entry on the CIMO/IMOP webpage: http://www.wmo.int/pages/prog/www/IMOP/intercomparisons.html for complete details on the instruments selected.

A Meeting of Participants in the Vigna di Valle  Intercomparison was held 21-22 May 2008. This was also attended by the HMEI Secretariat at the invitation of Dr Vuerich the Intercomparison Site Manager Please see here for the HMEI report of this meeting.

PREVIOUS INTERCOMPARISONS

The 10th International and Regional Pyrheliometer Intercomparison (IPC-X, RPCs) held in Davos, Switzerland, 26th September to 14 October 2005. 
Whilst this Intercomparison was mainly by invitation to National Radiation Centers for calibration of  their instruments, some manufacturers also participated, depending on space available.

HMEI Member companies Kipp and Zonen and Cimel Electronique had instruments at this Intercomparison.

The Final Report IPC-X is available at:
http://www.wmo.int/pages/prog/www/IMOP/intercomparisons.html

WMO Laboratory Intercomparison of Rainfall Intensity (RI) Gauges, 15 September 2004 to 14 March 2005. 
RIs tested, as indicated in the listing below, in Laboratories in France (FR), Italy (IT) and Netherlands (NL). 
The project leader was Prof Luca Lanza at the Universita' di Genova, Dipartimento di Ingegneria Ambientale (DIAM)

HMEI  manufacturers who participated as follows:
 - OTT Hydrometrie -------------------   Model: Pluvio 250mm (Weighing)
 - Cassella CEL Ltd. ------------------- Model: 100000E (Tipping Bucket)
 - Design Analysis Associates ----  Model: H-340-SDI (Tipping Bucket)
 - SIAP+MICROS -----------------------  Model: UM7525 (Tipping Bucket)
 - CAE Srl ----------------------------------  Model: PMB2 (Tipping Bucket)
 - MPS system s.r.o.-------------------- Model: TRwS (Weighing) 
 - Hydrological Services --------------- Model: TB-3 (Tipping Bucket)
 - Vaisala OYJ ---------------------------- Model: VRG101 (Weighing)
  - Yokogawa Denshikiki Co.---------- Model: WMB01 (Tipping Bucket)
 - Geonor AS ------------------------------ Model: T-200B (Weighing)
 - Wih Lambrecht-------------------------Model: 1518 H3 (Tipping Bucket)

Full details about this Intercomparison, the Laboratories and all the instruments who participated are available from the appropriate links at: http://www.wmo.int/pages/prog/www/IMOP/intercomparisons.html

The Final Report IPC-X is available at: http://www.wmo.int/pages/prog/www/IMOP/reports/2003-2007/RI-IC_Final_Report.pdf 

WMO Intercomparison of High Quality Radiosonde Systems in Mauritius - February 2005  

Letter of thanks and appreciation to HMEI from the WMO

The WMO preliminary findings report is available at: http://www.wmo.int/pages/prog/www/IMOP/meetings/Upper-Air/RSO-ComparisonMauritius/3(16)_UK_Nash_Vacoas.pdf
 

This Intercomparison was organized at the March 2004 Joint WMO/CIMO ET Meeting on Upper-Air Systems Intercomparisons
The Project Manager was Dr Beenay Pathack of the Meteorological services in Mauritius, the host country.

The following tables give details of the participants and the procedures of the Intercomparison.

 
Demonstration test of InterMet IMS 1600 Integrated Upper Air System, Dar-es-Salaam, Tanzania, 18-30 October 2004
This test was performed to demonstrate that:
(1) The InterMet IMS 1600 Integrated Upper Air System was able to measure winds
to a satisfactory operational accuracy
(2) Temperature and humidity measurements from Sippican and Modem
radiosondes were of the quality expected from these radiosondes.
It was also intended as an opportunity for the staff from Tanzania to work with staff from
the UK and USA to develop their upper air observation skills.
For the full report please go to: http://www.wmo.int/pages/prog//www/IMOP/reports/2003-2007/Tanzania_Demo%20Test.pdf

InterMet response to the WMO report.