Brightness temperature measured by ARIEL radiometer at 1.4GHz from July to September 2020 during the MOSAiC expedition
The data contains brightness temperature data measured by ARIEL at 1.4GHz, during the MOSAIC expedition, in particular from July to September 2022 (LEG4 and LEG5). The ARIEL radiometer is a dual polarization (H & V) total power radiometer with internal calibration. The central frequency is 1.41...
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Format: | Dataset |
Language: | English |
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PANGAEA
2022
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Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.943755 https://doi.org/10.1594/PANGAEA.943755 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.943755 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Action Arctic Arctic Ocean Binary Object Binary Object (File Size) brightness temperatures Comment DATE/TIME Event label Ice thickness L-Band Microwave Radiometer L-Band radiometry L-MRA MOSAiC MOSAiC20192020 MOSAiC expedition Multidisciplinary drifting Observatory for the Study of Arctic Climate Polarstern PS122/4 PS122/4_47-147 PS122/4_47-148 PS122/4_47-4 PS122/4_48-184 PS122/4_48-185 PS122/4_48-194 PS122/4_48-195 PS122/4_48-36 PS122/5 PS122/5_59-246 PS122/5_59-248 PS122/5_59-253 PS122/5_59-270 PS122/5_59-271 PS122/5_59-288 PS122/5_59-324 PS122/5_59-339 PS122/5_59-362 PS122/5_59-376 PS122/5_59-377 PS122/5_59-378 PS122/5_59-499 PS122/5_59-500 PS122/5_59-501 PS122/5_59-503 PS122/5_60-114 PS122/5_60-115 PS122/5_60-12 PS122/5_60-13 PS122/5_60-138 PS122/5_60-139 |
spellingShingle |
Action Arctic Arctic Ocean Binary Object Binary Object (File Size) brightness temperatures Comment DATE/TIME Event label Ice thickness L-Band Microwave Radiometer L-Band radiometry L-MRA MOSAiC MOSAiC20192020 MOSAiC expedition Multidisciplinary drifting Observatory for the Study of Arctic Climate Polarstern PS122/4 PS122/4_47-147 PS122/4_47-148 PS122/4_47-4 PS122/4_48-184 PS122/4_48-185 PS122/4_48-194 PS122/4_48-195 PS122/4_48-36 PS122/5 PS122/5_59-246 PS122/5_59-248 PS122/5_59-253 PS122/5_59-270 PS122/5_59-271 PS122/5_59-288 PS122/5_59-324 PS122/5_59-339 PS122/5_59-362 PS122/5_59-376 PS122/5_59-377 PS122/5_59-378 PS122/5_59-499 PS122/5_59-500 PS122/5_59-501 PS122/5_59-503 PS122/5_60-114 PS122/5_60-115 PS122/5_60-12 PS122/5_60-13 PS122/5_60-138 PS122/5_60-139 Gabarró, Carolina Fabregat, Pau Hernández-Macià, Ferran Martínez, Justino Jove, Roger Salvador, Joaquin Spreen, Gunnar Thielke, Linda von Albedyll, Luisa Brightness temperature measured by ARIEL radiometer at 1.4GHz from July to September 2020 during the MOSAiC expedition |
topic_facet |
Action Arctic Arctic Ocean Binary Object Binary Object (File Size) brightness temperatures Comment DATE/TIME Event label Ice thickness L-Band Microwave Radiometer L-Band radiometry L-MRA MOSAiC MOSAiC20192020 MOSAiC expedition Multidisciplinary drifting Observatory for the Study of Arctic Climate Polarstern PS122/4 PS122/4_47-147 PS122/4_47-148 PS122/4_47-4 PS122/4_48-184 PS122/4_48-185 PS122/4_48-194 PS122/4_48-195 PS122/4_48-36 PS122/5 PS122/5_59-246 PS122/5_59-248 PS122/5_59-253 PS122/5_59-270 PS122/5_59-271 PS122/5_59-288 PS122/5_59-324 PS122/5_59-339 PS122/5_59-362 PS122/5_59-376 PS122/5_59-377 PS122/5_59-378 PS122/5_59-499 PS122/5_59-500 PS122/5_59-501 PS122/5_59-503 PS122/5_60-114 PS122/5_60-115 PS122/5_60-12 PS122/5_60-13 PS122/5_60-138 PS122/5_60-139 |
description |
The data contains brightness temperature data measured by ARIEL at 1.4GHz, during the MOSAIC expedition, in particular from July to September 2022 (LEG4 and LEG5). The ARIEL radiometer is a dual polarization (H & V) total power radiometer with internal calibration. The central frequency is 1.41 GHz, with a bandwidth of 20 MHz. The system has a 2x1 patch antenna, with a beam width of 36 ◦ at 3 dB at the azimuth direction and 70 ◦ at 3 dB at the elevation angle. The radiometric accuracy of ARIEL is 1.06 K at 1 Hz sampling frequency, with the capability to measure at higher sampling rates (up to 10 Hz) at the expenses of the radiometric accuracy. A co-located thermal infrared photodiode to measure the surface temperature and a GPS receiver complete the sensor equipment. Calibration is performed with a hot load and a cold load. To adapt the ARIEL instrument to the harsh and cold conditions of the Arctic, two adaptions were required to increase the internal thermal resistance by adding isolating material and to apply conformal coating to protect the electronics against humidity. The ARIEL accuracy was 2.3 K (instead of 1 K, due to a software error on the sampling rate). This light (7 kg) and small radiometer (40 cm x 60 cm x 20 cm) is ideal for frequent manoeuvres. The radiometer was mounted on a wooden sledge to measure microwave emission at 40 ◦ incidence angle with respect to nadir. A calibration procedure for the radiometers is needed to convert the measured voltages to brightness temperatures. The calibration of the ARIEL was done pointing the radiometer to cold and hot targets. The cold target is the cold sky (approx. temperature of 6 K (from Le Vine and Skou (2006)), while the hot target was absorber material at the instrument frequency stored into a big box (which represent an emissivity of 1). The calibration routines were performed every few days (3-5 days). After filtering the outliers, the data was smoothed to further reduce the noise. A sliding window of 20 samples was applied, which has proven to ... |
format |
Dataset |
author |
Gabarró, Carolina Fabregat, Pau Hernández-Macià, Ferran Martínez, Justino Jove, Roger Salvador, Joaquin Spreen, Gunnar Thielke, Linda von Albedyll, Luisa |
author_facet |
Gabarró, Carolina Fabregat, Pau Hernández-Macià, Ferran Martínez, Justino Jove, Roger Salvador, Joaquin Spreen, Gunnar Thielke, Linda von Albedyll, Luisa |
author_sort |
Gabarró, Carolina |
title |
Brightness temperature measured by ARIEL radiometer at 1.4GHz from July to September 2020 during the MOSAiC expedition |
title_short |
Brightness temperature measured by ARIEL radiometer at 1.4GHz from July to September 2020 during the MOSAiC expedition |
title_full |
Brightness temperature measured by ARIEL radiometer at 1.4GHz from July to September 2020 during the MOSAiC expedition |
title_fullStr |
Brightness temperature measured by ARIEL radiometer at 1.4GHz from July to September 2020 during the MOSAiC expedition |
title_full_unstemmed |
Brightness temperature measured by ARIEL radiometer at 1.4GHz from July to September 2020 during the MOSAiC expedition |
title_sort |
brightness temperature measured by ariel radiometer at 1.4ghz from july to september 2020 during the mosaic expedition |
publisher |
PANGAEA |
publishDate |
2022 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.943755 https://doi.org/10.1594/PANGAEA.943755 |
op_coverage |
MEDIAN LATITUDE: 86.677966 * MEDIAN LONGITUDE: 82.936666 * SOUTH-BOUND LATITUDE: 79.745166 * WEST-BOUND LONGITUDE: -1.974803 * NORTH-BOUND LATITUDE: 89.154490 * EAST-BOUND LONGITUDE: 120.766727 * DATE/TIME START: 2020-07-13T08:09:00 * DATE/TIME END: 2020-09-30T09:31:00 * MINIMUM ELEVATION: -4322.6 m * MAXIMUM ELEVATION: -2111.0 m |
long_lat |
ENVELOPE(-1.974803,120.766727,89.154490,79.745166) |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Arctic Ocean |
op_relation |
Fabregat, Pau (2021): L-band radiometry: data processing and emissivity models for Arctic sea-ice. Degree Thesis, Escola Tècnica Superior d'Enginyeria de Telecomunicació de Barcelona, hdl:2117/357248 Hendricks, Stefan: FloeNavi - Coordinate Reference System. GitLab, https://gitlab.awi.de/groups/floenavi-crs Skou, Niels; Le Vine, David M (2006): Microwave Radiometer Systems: Design and Analysis. Artech https://doi.pangaea.de/10.1594/PANGAEA.943755 https://doi.org/10.1594/PANGAEA.943755 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.943755 |
_version_ |
1812808955757330432 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.943755 2024-10-13T14:03:50+00:00 Brightness temperature measured by ARIEL radiometer at 1.4GHz from July to September 2020 during the MOSAiC expedition Gabarró, Carolina Fabregat, Pau Hernández-Macià, Ferran Martínez, Justino Jove, Roger Salvador, Joaquin Spreen, Gunnar Thielke, Linda von Albedyll, Luisa MEDIAN LATITUDE: 86.677966 * MEDIAN LONGITUDE: 82.936666 * SOUTH-BOUND LATITUDE: 79.745166 * WEST-BOUND LONGITUDE: -1.974803 * NORTH-BOUND LATITUDE: 89.154490 * EAST-BOUND LONGITUDE: 120.766727 * DATE/TIME START: 2020-07-13T08:09:00 * DATE/TIME END: 2020-09-30T09:31:00 * MINIMUM ELEVATION: -4322.6 m * MAXIMUM ELEVATION: -2111.0 m 2022 text/tab-separated-values, 179 data points https://doi.pangaea.de/10.1594/PANGAEA.943755 https://doi.org/10.1594/PANGAEA.943755 en eng PANGAEA Fabregat, Pau (2021): L-band radiometry: data processing and emissivity models for Arctic sea-ice. Degree Thesis, Escola Tècnica Superior d'Enginyeria de Telecomunicació de Barcelona, hdl:2117/357248 Hendricks, Stefan: FloeNavi - Coordinate Reference System. GitLab, https://gitlab.awi.de/groups/floenavi-crs Skou, Niels; Le Vine, David M (2006): Microwave Radiometer Systems: Design and Analysis. Artech https://doi.pangaea.de/10.1594/PANGAEA.943755 https://doi.org/10.1594/PANGAEA.943755 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess Action Arctic Arctic Ocean Binary Object Binary Object (File Size) brightness temperatures Comment DATE/TIME Event label Ice thickness L-Band Microwave Radiometer L-Band radiometry L-MRA MOSAiC MOSAiC20192020 MOSAiC expedition Multidisciplinary drifting Observatory for the Study of Arctic Climate Polarstern PS122/4 PS122/4_47-147 PS122/4_47-148 PS122/4_47-4 PS122/4_48-184 PS122/4_48-185 PS122/4_48-194 PS122/4_48-195 PS122/4_48-36 PS122/5 PS122/5_59-246 PS122/5_59-248 PS122/5_59-253 PS122/5_59-270 PS122/5_59-271 PS122/5_59-288 PS122/5_59-324 PS122/5_59-339 PS122/5_59-362 PS122/5_59-376 PS122/5_59-377 PS122/5_59-378 PS122/5_59-499 PS122/5_59-500 PS122/5_59-501 PS122/5_59-503 PS122/5_60-114 PS122/5_60-115 PS122/5_60-12 PS122/5_60-13 PS122/5_60-138 PS122/5_60-139 dataset 2022 ftpangaea https://doi.org/10.1594/PANGAEA.943755 2024-10-02T00:42:44Z The data contains brightness temperature data measured by ARIEL at 1.4GHz, during the MOSAIC expedition, in particular from July to September 2022 (LEG4 and LEG5). The ARIEL radiometer is a dual polarization (H & V) total power radiometer with internal calibration. The central frequency is 1.41 GHz, with a bandwidth of 20 MHz. The system has a 2x1 patch antenna, with a beam width of 36 ◦ at 3 dB at the azimuth direction and 70 ◦ at 3 dB at the elevation angle. The radiometric accuracy of ARIEL is 1.06 K at 1 Hz sampling frequency, with the capability to measure at higher sampling rates (up to 10 Hz) at the expenses of the radiometric accuracy. A co-located thermal infrared photodiode to measure the surface temperature and a GPS receiver complete the sensor equipment. Calibration is performed with a hot load and a cold load. To adapt the ARIEL instrument to the harsh and cold conditions of the Arctic, two adaptions were required to increase the internal thermal resistance by adding isolating material and to apply conformal coating to protect the electronics against humidity. The ARIEL accuracy was 2.3 K (instead of 1 K, due to a software error on the sampling rate). This light (7 kg) and small radiometer (40 cm x 60 cm x 20 cm) is ideal for frequent manoeuvres. The radiometer was mounted on a wooden sledge to measure microwave emission at 40 ◦ incidence angle with respect to nadir. A calibration procedure for the radiometers is needed to convert the measured voltages to brightness temperatures. The calibration of the ARIEL was done pointing the radiometer to cold and hot targets. The cold target is the cold sky (approx. temperature of 6 K (from Le Vine and Skou (2006)), while the hot target was absorber material at the instrument frequency stored into a big box (which represent an emissivity of 1). The calibration routines were performed every few days (3-5 days). After filtering the outliers, the data was smoothed to further reduce the noise. A sliding window of 20 samples was applied, which has proven to ... Dataset Arctic Arctic Arctic Ocean PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean ENVELOPE(-1.974803,120.766727,89.154490,79.745166) |