Measurements on pointing error and field of view of Cimel-318 Sun photometers in the scope of AERONET
Sensitivity studies indicate that among the diverse error sources of ground-based sky radiometer observations, the pointing error plays an important role in the correct retrieval of aerosol properties. The accurate pointing is specially critical for the characterization of desert dust aerosol. The p...
Published in: | Atmospheric Measurement Techniques |
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ftaemet:oai:repositorio.aemet.es:20.500.11765/7508 2024-06-23T07:44:59+00:00 Measurements on pointing error and field of view of Cimel-318 Sun photometers in the scope of AERONET Torres, Benjamín Toledano, Carlos Berjón, Alberto Fuertes Marrón, David Molina, V. González, Ramiro Canini, Marius Cachorro, Victoria E. Goloub, Philippe Podvin, Thierry Blarel, Luc Dubovik, Oleg Bennouna, Yasmine Frutos Baraja, Ángel Máximo de 2013 https://hdl.handle.net/20.500.11765/7508 eng eng European Geosciences Union https://dx.doi.org/10.5194/amt-6-2207-2013 info:eu-repo/grantAgreement/EC/FP7/262254 Atmospheric Measurement Techniques. 2013, 6(8), p. 2207-2220 1867-1381 1867-8548 http://hdl.handle.net/20.500.11765/7508 Licencia CC: Reconocimiento CC BY info:eu-repo/semantics/openAccess Radiometer observations Error Desert dust aerosol AErosol RObotic NETwork Sun photometer info:eu-repo/semantics/article 2013 ftaemet https://doi.org/20.500.11765/750810.5194/amt-6-2207-2013 2024-06-03T14:17:56Z Sensitivity studies indicate that among the diverse error sources of ground-based sky radiometer observations, the pointing error plays an important role in the correct retrieval of aerosol properties. The accurate pointing is specially critical for the characterization of desert dust aerosol. The present work relies on the analysis of two new measurement procedures (cross and matrix) specifically designed for the evaluation of the pointing error in the standard instrument of the Aerosol Robotic Network (AERONET), the Cimel CE-318 Sun photometer. The first part of the analysis contains a preliminary study whose results conclude on the need of a Sun movement correction for an accurate evaluation of the pointing error from both new measurements. Once this correction is applied, both measurements show equivalent results with differences under 0.01° in the pointing error estimations. The second part of the analysis includes the incorporation of the cross procedure in the AERONET routine measurement protocol in order to monitor the pointing error in field instruments. The pointing error was evaluated using the data collected for more than a year, in 7 Sun photometers belonging to AERONET sites. We thank the AERONET, PHOTONS, RIMA and WRC staff for their scientific and technical support. Financial support was provided by the Spanish CICYT (CGL2009-09740 and CGL2011-23413, CGL2011-13085-E). The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 262254 [ACTRIS]. Article in Journal/Newspaper Aerosol Robotic Network ARCIMÍS (Archivo Climatológico y Meteorológico Institucional - AEMET, Agencia Estatal de Meteorología) Rima ENVELOPE(-45.400,-45.400,-60.633,-60.633) Atmospheric Measurement Techniques 6 8 2207 2220 |
institution |
Open Polar |
collection |
ARCIMÍS (Archivo Climatológico y Meteorológico Institucional - AEMET, Agencia Estatal de Meteorología) |
op_collection_id |
ftaemet |
language |
English |
topic |
Radiometer observations Error Desert dust aerosol AErosol RObotic NETwork Sun photometer |
spellingShingle |
Radiometer observations Error Desert dust aerosol AErosol RObotic NETwork Sun photometer Torres, Benjamín Toledano, Carlos Berjón, Alberto Fuertes Marrón, David Molina, V. González, Ramiro Canini, Marius Cachorro, Victoria E. Goloub, Philippe Podvin, Thierry Blarel, Luc Dubovik, Oleg Bennouna, Yasmine Frutos Baraja, Ángel Máximo de Measurements on pointing error and field of view of Cimel-318 Sun photometers in the scope of AERONET |
topic_facet |
Radiometer observations Error Desert dust aerosol AErosol RObotic NETwork Sun photometer |
description |
Sensitivity studies indicate that among the diverse error sources of ground-based sky radiometer observations, the pointing error plays an important role in the correct retrieval of aerosol properties. The accurate pointing is specially critical for the characterization of desert dust aerosol. The present work relies on the analysis of two new measurement procedures (cross and matrix) specifically designed for the evaluation of the pointing error in the standard instrument of the Aerosol Robotic Network (AERONET), the Cimel CE-318 Sun photometer. The first part of the analysis contains a preliminary study whose results conclude on the need of a Sun movement correction for an accurate evaluation of the pointing error from both new measurements. Once this correction is applied, both measurements show equivalent results with differences under 0.01° in the pointing error estimations. The second part of the analysis includes the incorporation of the cross procedure in the AERONET routine measurement protocol in order to monitor the pointing error in field instruments. The pointing error was evaluated using the data collected for more than a year, in 7 Sun photometers belonging to AERONET sites. We thank the AERONET, PHOTONS, RIMA and WRC staff for their scientific and technical support. Financial support was provided by the Spanish CICYT (CGL2009-09740 and CGL2011-23413, CGL2011-13085-E). The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 262254 [ACTRIS]. |
format |
Article in Journal/Newspaper |
author |
Torres, Benjamín Toledano, Carlos Berjón, Alberto Fuertes Marrón, David Molina, V. González, Ramiro Canini, Marius Cachorro, Victoria E. Goloub, Philippe Podvin, Thierry Blarel, Luc Dubovik, Oleg Bennouna, Yasmine Frutos Baraja, Ángel Máximo de |
author_facet |
Torres, Benjamín Toledano, Carlos Berjón, Alberto Fuertes Marrón, David Molina, V. González, Ramiro Canini, Marius Cachorro, Victoria E. Goloub, Philippe Podvin, Thierry Blarel, Luc Dubovik, Oleg Bennouna, Yasmine Frutos Baraja, Ángel Máximo de |
author_sort |
Torres, Benjamín |
title |
Measurements on pointing error and field of view of Cimel-318 Sun photometers in the scope of AERONET |
title_short |
Measurements on pointing error and field of view of Cimel-318 Sun photometers in the scope of AERONET |
title_full |
Measurements on pointing error and field of view of Cimel-318 Sun photometers in the scope of AERONET |
title_fullStr |
Measurements on pointing error and field of view of Cimel-318 Sun photometers in the scope of AERONET |
title_full_unstemmed |
Measurements on pointing error and field of view of Cimel-318 Sun photometers in the scope of AERONET |
title_sort |
measurements on pointing error and field of view of cimel-318 sun photometers in the scope of aeronet |
publisher |
European Geosciences Union |
publishDate |
2013 |
url |
https://hdl.handle.net/20.500.11765/7508 |
long_lat |
ENVELOPE(-45.400,-45.400,-60.633,-60.633) |
geographic |
Rima |
geographic_facet |
Rima |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_relation |
https://dx.doi.org/10.5194/amt-6-2207-2013 info:eu-repo/grantAgreement/EC/FP7/262254 Atmospheric Measurement Techniques. 2013, 6(8), p. 2207-2220 1867-1381 1867-8548 http://hdl.handle.net/20.500.11765/7508 |
op_rights |
Licencia CC: Reconocimiento CC BY info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/20.500.11765/750810.5194/amt-6-2207-2013 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
6 |
container_issue |
8 |
container_start_page |
2207 |
op_container_end_page |
2220 |
_version_ |
1802643294329503744 |