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PFR Travelling Standard - Overview





In the framework of the FP6 EUSAAR project (Network Activity NA4, WORCC has constructed an AOD Travelling Standard (TSD) consisting of a PFR and a mobile sun tracker (EKO model STR22). This activity is funded through a sub-contract with the Paul Scherrer Institute from April 2007 to January 2011.

On-site audits will be conducted at EUSAAR and European GAW sites over the project duration. Priority will be given to EUSAAR members followed by GAW and Associate members. As a result of such a “travelling standard” approach it is expected that the following benefits are realised:

  • Improvement in Quality Assured AOD data.

  • Minimisation in "down-time" of PFR sun-photometers during off-site calibration at WORCC, Davos.

  • Closer contact (on-site visits) means that problems can be more quickly resolved.

The solar tracker and PFR were delivered and integrated in March 2008, while calibration against the PFR primary reference trio at Davos occurs 2 - 3 times each year. The below table summarises completed and forthcoming Travelling Standard visits.

 


PFR Travelling Standard
shown on right with EKO
Tracker. Click to enlarge.



Station
EUSAAR station
Station abbrev.
Daily AOD (Affiliation)
On-site visit
TSD on-site or PFR swap*

Mace Head

Super-site
MHD
PFR (GAW-PFR)
8-12/4/2008
PFR swap
Cabauw
Super-site
CAB

PFR (GAW-PFR)
CIMEL (AERONET)
SPUV and MFRSR

10-12/6/2008
On-site

Ispra

Super-site
JRC
CIMEL (AERONET)
8-9/9/2008
On-site
Finokalia
Super-site
FKL
CIMEL (AERONET)
PFR & CIMEL located at HCMR, Crete
6-8/4/2009
On-site
Izana
GAW-PFR
IZO
CIMEL (AERONET)
6/2009
PFR swap
Demokritos
Associate
DEM
CIMEL (AERONET)
located NOA, Athens
3-6/08/2009
On-site
Melpitz
Super-site
MPZ
CIMEL (AERONET)
1-3/10/2009
On-site
Birkenes
Super-site
BIR
CIMEL (AERONET)
29/4-3/5/2010
On-site
Davos FRC
GAW-PFR
DAV
CIMEL (AERONET)
Sept-Oct. 2010
On-site
Puy de Dome
Super-site
PDD
CIMEL (AERONET)
Nov 2010 - 2011
On-site

* PFR swap = newly calibrated PFR taken to site, old PFR calibrated at Davos alongside PFR primary reference trio


WORCC, PMOD/WRC, Dorfstrasse 33, Davos Dorf
CH-7260, Switzerland, Tel. +41 58 467 5137

 

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