Initial Assessment of the COSMIC-2/FORMOSAT-7 Neutral Atmosphere Data Quality in NESDIS/STAR Using In Situ and Satellite Data
A COSMIC-1/FORMOSAT-3 (Constellation Observing System for Meteorology, Ionosphere, and Climate-1 and Formosa Satellite Mission 3) follow-on mission, COSMIC-2/FORMOSAT-7, had been successfully launched into low-inclination orbits on 25 June 2019. COSMIC-2 has a significantly increased Signal-to-Noise...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/12/24/4099 |
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| author | Shu-Peng Ho Xinjia Zhou Xi Shao Bin Zhang Loknath Adhikari Stanislav Kireev Yuxiang He James G. Yoe Wei Xia-Serafino Erin Lynch |
| author_facet | Shu-Peng Ho Xinjia Zhou Xi Shao Bin Zhang Loknath Adhikari Stanislav Kireev Yuxiang He James G. Yoe Wei Xia-Serafino Erin Lynch |
| author_sort | Shu-Peng Ho |
| collection | DOAJ |
| description | A COSMIC-1/FORMOSAT-3 (Constellation Observing System for Meteorology, Ionosphere, and Climate-1 and Formosa Satellite Mission 3) follow-on mission, COSMIC-2/FORMOSAT-7, had been successfully launched into low-inclination orbits on 25 June 2019. COSMIC-2 has a significantly increased Signal-to-Noise ratio (SNR) compared to other Radio Occultation (RO) missions. This study summarized the initial assessment of COSMIC-2 data quality conducted by the NOAA (National Oceanic and Atmospheric Administration) Center for Satellite Applications and Research (STAR). We use validated data from other RO missions to quantify the stability of COSMIC-2. In addition, we use the Vaisala RS41 radiosonde observations to assess the accuracy and uncertainty of the COSMIC-2 neutral atmospheric profiles. RS41 is currently the most accurate radiosonde observation system. The COSMIC-2 SNR ranges from 200 <i>v/v</i> to about 2800 <i>v/v</i>. To see if the high SNR COSMIC-2 signals lead to better retrieval results, we separate the COSMIC-2–RS41 comparisons into different SNR groups (i.e., 0–500 <i>v/v</i> group, 500–1000 <i>v/v</i> group, 1000–1500 <i>v/v</i> group, 1500–2000 <i>v/v</i> group, and >2000 <i>v/v</i> group). In general, the COSMIC-2 data quality in terms of stability, precision, accuracy, and uncertainty of the accuracy is very compatible with those from COSMIC-1. Results show that the mean COSMIC-2–RS41 water vapor difference from surface to 5 km altitude for each SNR groups are equal to −1.34 g/kg (0–500 <i>v/v</i>), −1.17 g/kg (500–1000 <i>v/v</i>), −1.33 g/kg (1000–1500 <i>v/v</i>), −0.93 g/kg (1500–2000 <i>v/v</i>), and −1.52 g/kg (>2000 <i>v/v</i>). Except for the >2000 <i>v/v</i> group, the high SNR measurements from COSMIC-2 seem to improve the mean water vapor difference for the higher SNR group slightly (especially for the 1500–2000 <i>v/v</i> group) comparing with those from lower SNR groups. |
| first_indexed | 2024-03-10T14:03:27Z |
| format | Article |
| id | doaj.art-dd230c01aa414bb4bda23feddf69a60b |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T14:03:27Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-dd230c01aa414bb4bda23feddf69a60b2023-11-21T00:56:54ZengMDPI AGRemote Sensing2072-42922020-12-011224409910.3390/rs12244099Initial Assessment of the COSMIC-2/FORMOSAT-7 Neutral Atmosphere Data Quality in NESDIS/STAR Using In Situ and Satellite DataShu-Peng Ho0Xinjia Zhou1Xi Shao2Bin Zhang3Loknath Adhikari4Stanislav Kireev5Yuxiang He6James G. Yoe7Wei Xia-Serafino8Erin Lynch9Center for Satellite Applications & Research (STAR), NESDIS/NOAA, College Park, MD 20740, USAGlobal Science & Technology, Inc., 7855 Walker Drive, Suite 200, Greenbelt, MD 20770, USACooperative Institute for Satellite Earth System Studies (CISESS), Earth System Science, Interdisciplinary Center, University of Maryland, College Park, MD 20740, USACooperative Institute for Satellite Earth System Studies (CISESS), Earth System Science, Interdisciplinary Center, University of Maryland, College Park, MD 20740, USACooperative Institute for Satellite Earth System Studies (CISESS), Earth System Science, Interdisciplinary Center, University of Maryland, College Park, MD 20740, USAGlobal Science & Technology, Inc., 7855 Walker Drive, Suite 200, Greenbelt, MD 20770, USAGlobal Science & Technology, Inc., 7855 Walker Drive, Suite 200, Greenbelt, MD 20770, USANational Weather Service, National Centers for Environmental Prediction (NCEP), NOAA, 1325 East West Highway, Silver Spring, MD 20910, USAOffice of Project, Planning, and Analysis, NOAA, Suite 6200 (6th Floor), 1335 East West Highway, Silver Spring, MD 20910, USACooperative Institute for Satellite Earth System Studies (CISESS), Earth System Science, Interdisciplinary Center, University of Maryland, College Park, MD 20740, USAA COSMIC-1/FORMOSAT-3 (Constellation Observing System for Meteorology, Ionosphere, and Climate-1 and Formosa Satellite Mission 3) follow-on mission, COSMIC-2/FORMOSAT-7, had been successfully launched into low-inclination orbits on 25 June 2019. COSMIC-2 has a significantly increased Signal-to-Noise ratio (SNR) compared to other Radio Occultation (RO) missions. This study summarized the initial assessment of COSMIC-2 data quality conducted by the NOAA (National Oceanic and Atmospheric Administration) Center for Satellite Applications and Research (STAR). We use validated data from other RO missions to quantify the stability of COSMIC-2. In addition, we use the Vaisala RS41 radiosonde observations to assess the accuracy and uncertainty of the COSMIC-2 neutral atmospheric profiles. RS41 is currently the most accurate radiosonde observation system. The COSMIC-2 SNR ranges from 200 <i>v/v</i> to about 2800 <i>v/v</i>. To see if the high SNR COSMIC-2 signals lead to better retrieval results, we separate the COSMIC-2–RS41 comparisons into different SNR groups (i.e., 0–500 <i>v/v</i> group, 500–1000 <i>v/v</i> group, 1000–1500 <i>v/v</i> group, 1500–2000 <i>v/v</i> group, and >2000 <i>v/v</i> group). In general, the COSMIC-2 data quality in terms of stability, precision, accuracy, and uncertainty of the accuracy is very compatible with those from COSMIC-1. Results show that the mean COSMIC-2–RS41 water vapor difference from surface to 5 km altitude for each SNR groups are equal to −1.34 g/kg (0–500 <i>v/v</i>), −1.17 g/kg (500–1000 <i>v/v</i>), −1.33 g/kg (1000–1500 <i>v/v</i>), −0.93 g/kg (1500–2000 <i>v/v</i>), and −1.52 g/kg (>2000 <i>v/v</i>). Except for the >2000 <i>v/v</i> group, the high SNR measurements from COSMIC-2 seem to improve the mean water vapor difference for the higher SNR group slightly (especially for the 1500–2000 <i>v/v</i> group) comparing with those from lower SNR groups.https://www.mdpi.com/2072-4292/12/24/4099GPS ROCOSMIC-2neutral atmospheric profilessatellite and in situ radiosonde observationslong term stabilityaccuracy |
| spellingShingle | Shu-Peng Ho Xinjia Zhou Xi Shao Bin Zhang Loknath Adhikari Stanislav Kireev Yuxiang He James G. Yoe Wei Xia-Serafino Erin Lynch Initial Assessment of the COSMIC-2/FORMOSAT-7 Neutral Atmosphere Data Quality in NESDIS/STAR Using In Situ and Satellite Data Remote Sensing GPS RO COSMIC-2 neutral atmospheric profiles satellite and in situ radiosonde observations long term stability accuracy |
| title | Initial Assessment of the COSMIC-2/FORMOSAT-7 Neutral Atmosphere Data Quality in NESDIS/STAR Using In Situ and Satellite Data |
| title_full | Initial Assessment of the COSMIC-2/FORMOSAT-7 Neutral Atmosphere Data Quality in NESDIS/STAR Using In Situ and Satellite Data |
| title_fullStr | Initial Assessment of the COSMIC-2/FORMOSAT-7 Neutral Atmosphere Data Quality in NESDIS/STAR Using In Situ and Satellite Data |
| title_full_unstemmed | Initial Assessment of the COSMIC-2/FORMOSAT-7 Neutral Atmosphere Data Quality in NESDIS/STAR Using In Situ and Satellite Data |
| title_short | Initial Assessment of the COSMIC-2/FORMOSAT-7 Neutral Atmosphere Data Quality in NESDIS/STAR Using In Situ and Satellite Data |
| title_sort | initial assessment of the cosmic 2 formosat 7 neutral atmosphere data quality in nesdis star using in situ and satellite data |
| topic | GPS RO COSMIC-2 neutral atmospheric profiles satellite and in situ radiosonde observations long term stability accuracy |
| url | https://www.mdpi.com/2072-4292/12/24/4099 |
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