{"id":4479,"date":"2024-05-11T10:00:00","date_gmt":"2024-05-11T03:00:00","guid":{"rendered":"https:\/\/opengis.vn\/?p=4479"},"modified":"2024-05-27T16:09:25","modified_gmt":"2024-05-27T09:09:25","slug":"gioi-thieu-ve-ve-tinh-sentinel-4","status":"publish","type":"post","link":"https:\/\/opengis.vn\/en\/blog\/gioi-thieu-ve-ve-tinh-sentinel-4\/","title":{"rendered":"Gi\u1edbi thi\u1ec7u v\u1ec1 v\u1ec7 tinh Sentinel-4"},"content":{"rendered":"

T\u00e1c gi\u1ea3: T\u00f4 Nguy\u1ec5n Nh\u1eadt Kh\u00f4i<\/em> \u2013
John D. Nguy\u1ec5n<\/em><\/p>\n\n\n\n

S\u1ee9 m\u1ec7nh c\u1ee7a Sentinel-4<\/h4>\n\n\n\n

Sentinel-4<\/mark> l\u00e0 thi\u1ebft b\u1ecb quang ph\u1ed5 \u0111\u01b0\u1ee3c \u0111\u1eb7t tr\u00ean v\u1ec7 tinh MTG-S tr\u00ean qu\u1ef9 \u0111\u1ea1o \u0111\u1ecba t\u0129nh, \u0111\u01b0\u1ee3c \u0111i\u1ec1u h\u00e0nh b\u1edfi ESA v\u00e0 C\u01a1 quan M\u00f4i tr\u01b0\u1eddng Ch\u00e2u \u00c2u (EEA) v\u1edbi s\u1ee9 m\u1ec7nh gi\u00e1m s\u00e1t kh\u00ed quy\u1ec3n tr\u00ean kh\u1eafp ch\u00e2u \u00c2u. Th\u00e0nh ph\u1ea7n Kh\u00f4ng gian Copernicus bao g\u1ed3m m\u1ed9t lo\u1ea1t c\u00e1c nhi\u1ec7m v\u1ee5 chuy\u00ean d\u1ee5ng tr\u00ean kh\u00f4ng gian \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ‘Sentinels’ v\u00e0 \u0111\u01b0\u1ee3c C\u01a1 quan V\u0169 tr\u1ee5 Ch\u00e2u \u00c2u ph\u00e1t tri\u1ec3n v\u00e0 cung c\u1ea5p. C\u00e1c nhi\u1ec7m v\u1ee5 ti\u1ec1n th\u00e2n Sentinel-4, Sentinel<\/mark>-5 v\u00e0 Sentinel<\/mark>-5 precursor<\/mark> (t\u01b0\u01a1ng \u1ee9ng l\u00e0 S4, S5, S5P) \u0111\u01b0\u1ee3c coi l\u00e0 c\u00e1c y\u1ebfu t\u1ed1 b\u1ed5 sung c\u1ee7a m\u1ed9t ch\u00f2m sao ph\u1ee5c v\u1ee5 c\u00e1c nhu c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a CAMS.<\/p>\n\n\n\n

M\u1ee5c ti\u00eau ch\u00ednh c\u1ee7a s\u1ee9 m\u1ec7nh Sentinel-4 l\u00e0 gi\u00e1m s\u00e1t c\u00e1c lo\u1ea1i kh\u00ed quan tr\u1ecdng nh\u01b0 O3<\/sub> (Ozone), NO2<\/sub> (Nitrogen dioxide), SO2<\/sub> (Sulfur dioxide), HCHO (Formaldehyde), CHOCHO (glyoxal), c\u0169ng nh\u01b0 c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a sol kh\u00ed \u0111\u1ec3 h\u1ed7 tr\u1ee3 D\u1ecbch v\u1ee5 gi\u00e1m s\u00e1t kh\u00ed quy\u1ec3n Copernicus (CAMS) \u1edf \u0111\u1ed9 ph\u00e2n gi\u1ea3i kh\u00f4ng gian v\u00e0 th\u1eddi gian cao. Ngo\u00e0i ra, c\u00e1c s\u1ee9 m\u1ec7nh S5 v\u00e0 S5P c\u1ee7a Qu\u1ef9 \u0111\u1ea1o Tr\u00e1i \u0111\u1ea5t th\u1ea5p (LEO) s\u1ebd cung c\u1ea5p c\u00e1c lo\u00e0i m\u1ee5c ti\u00eau S4 v\u00e0 b\u1ed5 sung th\u00eam CO (carbon monoxide), CH4<\/sub> (metan) v\u00e0 O3<\/sub> t\u1ea7ng b\u00ecnh l\u01b0u (ozone) v\u1edbi ph\u1ea1m vi bao ph\u1ee7 h\u00e0ng ng\u00e0y tr\u00ean to\u00e0n c\u1ea7u v\u1ec1 kh\u00ed h\u1eadu, ch\u1ea5t l\u01b0\u1ee3ng kh\u00f4ng kh\u00ed v\u00e0 ozone \/\u1ee9ng d\u1ee5ng UV b\u1ec1 m\u1eb7t.<\/p>\n\n\n\n

\"\"
H\u00ecnh 1. V\u1ec7 tinh MTG-S mang thi\u1ebft b\u1ecb Sentinel-4.
(Ngu\u1ed3n: ESA)<\/figcaption><\/figure>\n\n\n\n

Th\u00f4ng tin c\u01a1 b\u1ea3n c\u1ee7a Sentinel-4<\/strong><\/h4>\n\n\n\n
TT<\/strong><\/td>Th\u00f4ng tin nhanh<\/strong><\/td>Ghi ch\u00fa<\/strong><\/td><\/tr><\/thead>
1 <\/td>Ng\u00e0y ra m\u1eaft Sentinel-4
(Lunch date<\/em>)<\/td>		D\u1ef1 ki\u1ebfn 2025<\/td><\/tr>
2 <\/td>Qu\u1ef9 \u0111\u1ea1o
(Orbit<\/em>)<\/td>		 <\/td><\/tr>
3 <\/td>\u0110\u1ed9 cao qu\u1ef9 \u0111\u1ea1o
(Altitude<\/em>)<\/td>		36,000 km \u1edf tr\u00ean Ch\u00e2u \u00c2u v\u00e0 c\u1ed1 \u0111\u1ecbnh \u1edf Kinh \u0111\u1ed9 0 (X\u00edch \u0111\u1ea1o).<\/td><\/tr>
4 <\/td>G\u00f3c nghi\u00eang
Inclination<\/em>)<\/td>		 <\/td><\/tr>
5<\/td>Chu k\u1ef3 l\u1eb7p
Cycle\/Revisit<\/em>)<\/td>		 1 gi\u1edd<\/td><\/tr>
6<\/td>Gi\u1edd \u0111\u1ecba ph\u01b0\u01a1ng
(Local time<\/em>)<\/td>		<\/td><\/tr>
7<\/td>S\u1ee9 m\u1ec7nh
(Mission<\/em>)<\/td>		Gi\u00e1m s\u00e1t ch\u1ea5t l\u01b0\u1ee3ng kh\u00f4ng kh\u00ed. C\u00e1c lo\u00e0i \u0111\u01b0\u1ee3c theo d\u00f5i: O3<\/sub>, NO2<\/sub>, SO2<\/sub>, HCHO, CHOCHO.<\/td><\/tr>
8<\/td>Thi\u1ebft b\u1ecb \u0111i k\u00e8m
(Payload instruments<\/em>)<\/td>		M\u00e1y quang ph\u1ed5 \u0111a ph\u1ed5 c\u1ef1c t\u00edm v\u00e0 c\u1eadn h\u1ed3ng ngo\u1ea1i
The Ultra-Violet and Near Infra-Red Multispectral Spectrometer (S4 UVN)<\/em>
M\u00e1y \u0111o \u00e2m thanh h\u1ed3ng ngo\u1ea1i
The Infra-Red Sounder (IRS)<\/em><\/td><\/tr>
9<\/td>Tu\u1ed5i th\u1ecd thi\u1ebft k\u1ebf
(Design lifetime<\/em>)<\/td>		8.5 n\u0103m<\/td><\/tr>
10<\/td>Kh\u1ed1i l\u01b0\u1ee3ng
(Mass<\/em>)<\/td>		3,600 kg<\/td><\/tr>
11<\/td>K\u00edch th\u01b0\u1edbc
(Dimensions<\/em>)<\/td>		2.280 x 2.760 x 5.170m<\/td><\/tr>
12<\/td>C\u01a1 quan kh\u00f4ng gian
(Space agency<\/em>)<\/td>		EUMETSAT<\/a> , ESA<\/a>, COM<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Thi\u1ebft b\u1ecb c\u1ea3m bi\u1ebfn<\/strong><\/h4>\n\n\n\n

Seninel-4 l\u00e0 thi\u1ebft b\u1ecb quang ph\u1ed5 ch\u1ee5p \u1ea3nh th\u1ee5 \u0111\u1ed9ng UVN (Ultraviolet-Visible-Near-Infrared) bao g\u1ed3m 3 b\u1ed9 ph\u1eadn ch\u00ednh g\u1ed3m m\u00f4 \u0111un quang h\u1ecdc OIM., b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ICU v\u00e0 thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed \u0111i\u1ec1u khi\u1ec3n m\u00e1y qu\u00e9t SDE v\u1edbi c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m:<\/p>\n\n\n\n