Guicai Li1, Chuan Li 1, Yuanyuan Wang 1, Gengmin Jiang 2, Jie Chen 1,

Cheng Liu 1, Wei Zheng 1, Zheng Guo 1, Liqin Hu 1, Min Min 1, Guoqing Li 3

ligc@cma.cn

1.National Satellite Meteorological Center, China Meteorological Administrtor, Beijing 100081, China

2.Key Lab for Information Science of ElectromagneticWaves, Fudan University, Shanghai 200433, China

3.The Aerospace Information Research Institute (AIR), Chinese Academy of Sciences (CAS) , Beijing 100094,

China

A Quick Monitoring System (GeoQuick) Based

On New-Generation Geostationary

Meteorological Satellites

AOMSUC-10, Melbourne, Australia, Dec. 4-6, 2019

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 2

Outline

1. Background

2. Data processing of geostationary satellites in GeoQuick

3. Examples of monitoring products and applications

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 3

Fengyun 4A Advanced Geo. Radiation Imager(AGRI)

Himawari 8 Advanced Himawari Imager (AHI)

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 4

Himawari 8/AHI, FY4A/AGRI and FY2/VISSR

(Li Jun, et al., 2015, report)

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 5

Outline

1. Payloads of Fengyun-4A and Himawari-8

2. Data processing of geostationary satellites in GeoQuick

3. Examples of monitoring products and applications

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 6

(Min M, et al., 2017)Functional structure of FYGAT-1

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 7

① Full disk（HSD format），1 observation/10min，84 GB/day。

② Full disk color picture（PNG）， 1 observation/10min，9GB/day。

③ color picture of regional intensive observations（NetCDF），

1observation/2.5min，6GB/day。

④ regional intensive observations （HSD），1 observation/2.5min，4GB/day。

⑤ Accumulated data size: 104GB/day

Data size (AHI)

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 8

10 segments * 16 bands →

Jointing to full disk images

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 9

Transverse Mercator projection

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 10

Processing time of original data

① Downloading

② Unzipping

③ Image mosaicking

④ Image correction

2000m

30s

9s

2s

7s

Sum 48s

Tota l 237s

(4min)

1000m

30s

11s

6s

12s

Sum 59s

500m

30s

33s

27s

40s

Sum 130s

Computing environment: 2.3G*20cores, 32G RAM

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 11

Processing time of products① RGB Full disk: 76s

② Land surface temperature: 30s

③ Temporal normalized LST: 114s

④ Air temperature: 26s

⑤ Fire point: 3s

⑥ Ultraviolet radiation: 7s

Total: 4.5 min

Computing environment: 2.3G*20cores, 32G RAM

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 12

Outline

1. Background

2. Data processing of geostationary satellites in GeoQuick

3. Examples of monitoring products and applications

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 13

Monitoring products

① Full disk color image (AGRI, AHI)

② Land surf. Temperature (AHI)

③ Normalized Land surf. Temperature (AHI)

④ Air temperature (AHI)

⑤ Fire point (AGRI)

⑥ Ultraviolet radiation (AGRI)

RGB LST UVR Air temperature

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 14

System Interface

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 15

UV -A UV-B UV-C

Wavelength

(nanometer, nm)

315-400 280-315 100-280

Absorption by

the ozone layer

Penetrates the

ozone layer

Mostly absorbed

by the ozone layer

Almost all

absorbed by the

ozone layer

Amount

reaching the

Earth's surface

>98% of UV

radiation is

UV-A

<2% of UV

radiation is

UV-B

Negligible

FY-4A UV Index products in GeoQuick

Ultraviolet Radiation is the radiation received at the Earth’s surface

over a spectral range of 280-400 nm.

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 16

How to estimate UVI?

➢ We used the total Surface Solar Irradiance (SSI, with a nominal spectral range of 200-5000nm)

product which is available in NSMC. Validation of SSI has been carried out using CERES FLASH

SSF/AQUA (NASA,USA) products and the results show good agreements between the two

products.

➢ Similar to SSI, UVR (Ultraviolet Radiation) also depends mainly on atmospheric transmittance, but

to a lesser extent on surface reflectance.

➢ By using comprehensive radiative transfer modelling, the relationship between SSI and UVR

(Ultraviolet Radiation, in the form of UV-index) can be developed, which lays the foundation for FY-

4A UVI algorithm.

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 17

The FY-4A UV Index products

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 18

Temporal normalized LST products in GeoQuick

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 19

Diurnal cycles of fire intensity

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 20

Summary

1. GeoQuick is designed to effectively processnew generation of Geostationary data toobtain fast changing phenomenon mainlyrelated to thermal/radiation features onland surface.

2. GeoQuick has been proved to be capable ofcapturing useful information.

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 21

GeoQuick

http://47.92.131.205:8080/GEO-Quick/f/

Please contact ligc@cma.gov.cn if you have any

questions or comments.

AOMSUC-10, Melbourne, AustraliaDec. 4-6, 2019 22

Make the data better and easier to use !