Calculation of Geostationary Satellites&#39; Nominal Fixed Grid and Its Application in FY-4A Advanced Geosynchronous Radiation Imager

Jing Wang; Chengbao Liu; Lei Yang; Jian Shang; Zhiqing Zhang

doi:10.3788/AOS201838.1211001

Journals >Acta Optica Sinica >Volume 38 >Issue 12 >Page 1211001 > Article

Acta Optica Sinica
Vol. 38, Issue 12, 1211001 (2018)

Calculation of Geostationary Satellites' Nominal Fixed Grid and Its Application in FY-4A Advanced Geosynchronous Radiation Imager

Jing Wang^*, Chengbao Liu, Lei Yang^**, Jian Shang, and Zhiqing Zhang

Author Affiliations

National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, China

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DOI: 10.3788/AOS201838.1211001 Cite this Article Set citation alerts

Jing Wang, Chengbao Liu, Lei Yang, Jian Shang, Zhiqing Zhang. Calculation of Geostationary Satellites' Nominal Fixed Grid and Its Application in FY-4A Advanced Geosynchronous Radiation Imager[J]. Acta Optica Sinica, 2018, 38(12): 1211001 Copy Citation Text

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Fig. 1. Schematic of scanning mirror optical path of FY-4A imager

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Fig. 2. Satellite coordinates defined in CGMS

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Fig. 3. Satellite coordinates defined in GOES-R

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Fig. 4. East-west and north-south pointing angles in CGMS and GOES-R

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Fig. 5. (a) Caspian sea L1 image+CGMS coastline; (b) Caspian sea L1 image+GOES-R coastline; (c) Caspian sea transformed image+GOES-R coastline

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Fig. 6. (a) Western coastline of Australia L1 image+CGMS coastline; (b) western coastline of Australia L1 image+GOES-R coastline; (c) western coastline of Australia transformed image+GOES-R coastline

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Fig. 7. (a) Eastern coastline of Australia L1 image+CGMS coastline; (b) eastern coastline of Australia L1 image+GOES-R coastline; (c) eastern coastline of Australia transformed image+GOES-R coastline

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Fig. 8. (a) Somalia L1 image+CGMS coastline; (b) Somalia L1 image+GOES-R coastline; (c) Somalia transformed image+GOES-R coastline

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Fig. 9. (a) Western coastline of Java island L1 image+CGMS coastline; (b) western coastline of Java island L1 image+GOES-R coastline; (c) western coastline of Java island transformed image+GOES-R coastline

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Fig. 10. (a) Sakhalin island L1 image+CGMS coastline; (b) Sakhalin island L1 image+GOES-R coastline; (c) Sakhalin island transformed image+GOES-R coastline

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Fig. 11. Distribution of calculated coastlines on the full disk

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Fig. 12. (a) Differences of east-west angles between FY-4A and GOES-R; (b) differences of north-south angles between FY-4A and GOES-R

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Fig. 13. (a) Differences of east-west angles between FY-4A and CGMS; (b) differences of north-south angles between FY-4A and CGMS

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Definition	Calculation formula	Positive direction
CGMS	β= $\begin{matrix} \frac{λ_{S}}{2} \end{matrix}$ = $\begin{matrix} \frac{1}{2} \end{matrix}$ arctan $\begin{matrix} (\frac{S_{y}}{S_{x}}) \end{matrix}$ α= $\begin{matrix} \frac{ϕ_{S}}{2} \end{matrix}$ = $\begin{matrix} \frac{1}{2} \end{matrix}$ arcsin $\begin{matrix} (\frac{S_{z}}{\sqrt[]{S_{x}^{2} + S_{y}^{2} + S_{z}^{2}}}) \end{matrix}$	Northwest
GOES-R	β= $\begin{matrix} \frac{x}{2} \end{matrix}$ = $\begin{matrix} \frac{1}{2} \end{matrix}$ arcsin $\begin{matrix} (\frac{- S_{y}}{\sqrt[]{{S^{2}}_{x} + {S^{2}}_{y} + {S^{2}}_{z}}}) \end{matrix}$ α= $\begin{matrix} \frac{y}{2} \end{matrix}$ = $\begin{matrix} \frac{1}{2} \end{matrix}$ arctan $\begin{matrix} (\frac{S_{z}}{S_{x}}) \end{matrix}$	Northeast

Table 1. Scanning and stepping angles of normal fixed grid

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