Global Navigation Satellite System Occultation Sounder II (GNOS II)

Sun, Yueqiang; Liu, Congliang; Du, Qingyun; Wang, Xianyi; Bai, Weihua; Kirchengast, Gottfried; Xia, Junming; Meng, Xiang‐Gao; Wang, Dongwei; Cai, Yuerong; Zhao, Danyang; Wu, Cindy; Li, Wei; Liu, Cheng

doi:10.1109/igarss.2017.8127170

Cited by 20 publications

(20 citation statements)

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“…In order to retrieve neutral atmospheric parameters, the ionosphere effects on the bending angles need to be eliminated. For the GNSS L band signals, the ionosphere refractivity is proportional to the inverse square of the frequencies, whereas the neutral atmosphere refractivity is almost independent of the frequencies (Vorob'ev and Krasil'nikova, 1994;Syndergaard et al, 2000). Therefore, a dual-frequency linear combination can mostly correct the first-order ionospheric effects (Vorob'ev and Krasil'nikova, 1994).…”

Section: Fy-3c Gnos Level 2 Data Processingmentioning

confidence: 99%

“…When GNSS signals propagate through the ionosphere from GNSS satellites to the FY-3C satellite, their propagation paths are bent and delayed by ionosphere refraction effects. The TEC can hence be calculated by using the dual-frequency difference signal (e.g., Syndergaard et al, 2000),…”

Section: Fy-3c Gnos Level 2 Data Processingmentioning

confidence: 99%

“…Timeline of FY-3 series satellites. The FY-3 series satellites are the Chinese second-generation polar-orbiting meteorological satellites including AM (morning), PM (afternoon), and EM (evening) orbits, and rainfall types of satellites, which have been/will be launched in three batches (source: Sun et al, 2017).…”

mentioning

confidence: 99%

“…1) will continue to carry GNOS as a major payload. The next one of these satellites is FY-3D, which was launched on 15 November 2017 (Liao et al, 2016b;Yang et al, 2017;Sun et al, 2017).…”

mentioning

confidence: 99%

“…After filtering and down-conversion in the RFU, the signals are digitally down-converted with an analog-todigital converter (ADC) and then sampled at a high rate and transmitted to the channel processor of the EU, where the GNOS accomplishes navigation, positioning and occulting GNSS satellite prediction and selection, signal acquisition and tracking, and data handling. An ultra-stable oscillator (USO) is used as a reference oscillator with highly stable frequency (1 s Allan deviation of 10 −12 ), in order to retrieve atmospheric measurements with high accuracy (Du et al, 2016;Sun et al, 2017). It also allows data users to invert the excess phase by using the zero-difference method (Beyerle et al, 2005;Bai et al, 2018).…”

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confidence: 99%

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The FengYun-3C radio occultation sounder GNOS: a review of the mission and its early results and science applications

et al. 2018

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Abstract. The Global Navigation Satellite System (GNSS) Occultation Sounder (GNOS) is one of the new-generation payloads on board the Chinese FengYun 3 (FY-3) series of operational meteorological satellites for sounding the Earth's neutral atmosphere and ionosphere. FY-3C GNOS, on board the FY-3 series C satellite launched in September 2013, was designed to acquire setting and rising radio occultation (RO) data by using GNSS signals from both the Chinese BeiDou Navigation Satellite System (BDS) and the US Global Positioning System (GPS). So far, the GNOS measurements and atmospheric and ionospheric data products have been validated and evaluated and then been used for atmosphere- and ionosphere-related scientific applications. This paper reviews the FY-3C GNOS instrument, RO data processing, data quality evaluation, and preliminary research applications according to the state-of-the-art status of the FY-3C GNOS mission and related publications. The reviewed data validation and application results demonstrate that the FY-3C GNOS mission can provide accurate and precise atmospheric and ionospheric GNSS (i.e., GPS and BDS) RO profiles for numerical weather prediction (NWP), global climate monitoring (GCM), and space weather research (SWR). The performance of the FY-3C GNOS product quality evaluation and scientific applications establishes confidence that the GNOS data from the series of FY-3 satellites will provide important contributions to NWP, GCM, and SWR scientific communities.

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Section: Fy-3c Gnos Level 2 Data Processingmentioning

confidence: 99%

Section: Fy-3c Gnos Level 2 Data Processingmentioning

confidence: 99%

mentioning

confidence: 99%

“…1) will continue to carry GNOS as a major payload. The next one of these satellites is FY-3D, which was launched on 15 November 2017 (Liao et al, 2016b;Yang et al, 2017;Sun et al, 2017).…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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