Validation of CryoSat-2 products over the East Antarctica Ice Sheet
A main goal of the CryoSat-2 mission is to observe the variations in the elevation of the polar ice sheets within a few centimeters accuracy. To fulfill this challenging objective the CryoSat-2 Level 2 products need to be validated against independent measurements. Kinematic GNSS is a well establish...
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ftawi:oai:epic.awi.de:41445 2023-05-15T13:40:27+02:00 Validation of CryoSat-2 products over the East Antarctica Ice Sheet Schröder, Ludwig Helm, Veit Richter, A. Fedorov, D. Eberlein, L. Brovkov, E. Knöfel, C. Horwath, M. Lukin, V. 2016-05 https://epic.awi.de/id/eprint/41445/ https://hdl.handle.net/10013/epic.48365 unknown Schröder, L. , Helm, V. orcid:0000-0001-7788-9328 , Richter, A. , Fedorov, D. , Eberlein, L. , Brovkov, E. , Knöfel, C. , Horwath, M. and Lukin, V. (2016) Validation of CryoSat-2 products over the East Antarctica Ice Sheet , ESA Living Planet Symposium, Prague, Czech Republic, 9 May 2016 - 13 May 2016 . hdl:10013/epic.48365 EPIC3ESA Living Planet Symposium, Prague, Czech Republic, 2016-05-09-2016-05-13 Conference notRev 2016 ftawi 2021-12-24T15:41:48Z A main goal of the CryoSat-2 mission is to observe the variations in the elevation of the polar ice sheets within a few centimeters accuracy. To fulfill this challenging objective the CryoSat-2 Level 2 products need to be validated against independent measurements. Kinematic GNSS is a well established method to derive ground based surface elevation profiles with high accuracy, thus providing independent data to investigate the reliability of the radar altimetry observations. During the last decade a variety of such measurements could be realized in cooperation with the Russian Antarctic Expedition (RAE). Since 2007 we have realized the installation of several geodetic GNSS equipments on vehicles of the scientific and logistic convoys. These profiles between the Russian Antarctic research station Vostok (78° 28' S, 106° 50' E) and the coastal stations Mirny and Progress have a length of about 1,600 km each. Over several years the repetition of these profiles show that the elevation change is negligibly small in this region which forms an important precondition when comparing older GNSS profiles with recent CryoSat-2 data. Thus, the GNSS profiles give us the unique opportunity to validate both CryoSat-2 LRM-Mode data in the flat interior of the Antarctic Ice Sheet and SARIn-Mode data in the steep and rough coastal area. Validation results of the crossover analysis with Baseline B data are presented. We show how the new Baseline C processor version improves the observation quality. Furthermore, the alternate AWI processing version is used for comparison. Additionally, we will test the performance of the advanced swath processing technique in areas covered by the SARIn mode. Besides the Level 2 products we furthermore present the results of the validation of different digital elevation models (DEM). The probably most popular DEM for Antarctica, Bedmap2, is based mainly on ICESat, ERS-1 and small-scale local datasets. We show that a DEM based on CryoSat-2 data only has the advantage of a much higher consistency and of less interpolation errors due to the dense satellite ground tracks. Conference Object Antarc* Antarctic Antarctica East Antarctica Ice Sheet Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic East Antarctica Mirny ENVELOPE(93.009,93.009,-66.553,-66.553) Rae ENVELOPE(-44.600,-44.600,-60.750,-60.750) The Antarctic |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
A main goal of the CryoSat-2 mission is to observe the variations in the elevation of the polar ice sheets within a few centimeters accuracy. To fulfill this challenging objective the CryoSat-2 Level 2 products need to be validated against independent measurements. Kinematic GNSS is a well established method to derive ground based surface elevation profiles with high accuracy, thus providing independent data to investigate the reliability of the radar altimetry observations. During the last decade a variety of such measurements could be realized in cooperation with the Russian Antarctic Expedition (RAE). Since 2007 we have realized the installation of several geodetic GNSS equipments on vehicles of the scientific and logistic convoys. These profiles between the Russian Antarctic research station Vostok (78° 28' S, 106° 50' E) and the coastal stations Mirny and Progress have a length of about 1,600 km each. Over several years the repetition of these profiles show that the elevation change is negligibly small in this region which forms an important precondition when comparing older GNSS profiles with recent CryoSat-2 data. Thus, the GNSS profiles give us the unique opportunity to validate both CryoSat-2 LRM-Mode data in the flat interior of the Antarctic Ice Sheet and SARIn-Mode data in the steep and rough coastal area. Validation results of the crossover analysis with Baseline B data are presented. We show how the new Baseline C processor version improves the observation quality. Furthermore, the alternate AWI processing version is used for comparison. Additionally, we will test the performance of the advanced swath processing technique in areas covered by the SARIn mode. Besides the Level 2 products we furthermore present the results of the validation of different digital elevation models (DEM). The probably most popular DEM for Antarctica, Bedmap2, is based mainly on ICESat, ERS-1 and small-scale local datasets. We show that a DEM based on CryoSat-2 data only has the advantage of a much higher consistency and of less interpolation errors due to the dense satellite ground tracks. |
format |
Conference Object |
author |
Schröder, Ludwig Helm, Veit Richter, A. Fedorov, D. Eberlein, L. Brovkov, E. Knöfel, C. Horwath, M. Lukin, V. |
spellingShingle |
Schröder, Ludwig Helm, Veit Richter, A. Fedorov, D. Eberlein, L. Brovkov, E. Knöfel, C. Horwath, M. Lukin, V. Validation of CryoSat-2 products over the East Antarctica Ice Sheet |
author_facet |
Schröder, Ludwig Helm, Veit Richter, A. Fedorov, D. Eberlein, L. Brovkov, E. Knöfel, C. Horwath, M. Lukin, V. |
author_sort |
Schröder, Ludwig |
title |
Validation of CryoSat-2 products over the East Antarctica Ice Sheet |
title_short |
Validation of CryoSat-2 products over the East Antarctica Ice Sheet |
title_full |
Validation of CryoSat-2 products over the East Antarctica Ice Sheet |
title_fullStr |
Validation of CryoSat-2 products over the East Antarctica Ice Sheet |
title_full_unstemmed |
Validation of CryoSat-2 products over the East Antarctica Ice Sheet |
title_sort |
validation of cryosat-2 products over the east antarctica ice sheet |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/41445/ https://hdl.handle.net/10013/epic.48365 |
long_lat |
ENVELOPE(93.009,93.009,-66.553,-66.553) ENVELOPE(-44.600,-44.600,-60.750,-60.750) |
geographic |
Antarctic East Antarctica Mirny Rae The Antarctic |
geographic_facet |
Antarctic East Antarctica Mirny Rae The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
op_source |
EPIC3ESA Living Planet Symposium, Prague, Czech Republic, 2016-05-09-2016-05-13 |
op_relation |
Schröder, L. , Helm, V. orcid:0000-0001-7788-9328 , Richter, A. , Fedorov, D. , Eberlein, L. , Brovkov, E. , Knöfel, C. , Horwath, M. and Lukin, V. (2016) Validation of CryoSat-2 products over the East Antarctica Ice Sheet , ESA Living Planet Symposium, Prague, Czech Republic, 9 May 2016 - 13 May 2016 . hdl:10013/epic.48365 |
_version_ |
1766135122239684608 |