{"id":4622,"date":"2024-05-07T10:00:00","date_gmt":"2024-05-07T03:00:00","guid":{"rendered":"https:\/\/opengis.vn\/?p=4622"},"modified":"2024-06-04T18:04:34","modified_gmt":"2024-06-04T11:04:34","slug":"gioi-thieu-ve-ve-tinh-sentinel-2","status":"publish","type":"post","link":"https:\/\/opengis.vn\/en\/blog\/gioi-thieu-ve-ve-tinh-sentinel-2\/","title":{"rendered":"Gi\u1edbi thi\u1ec7u v\u1ec1 v\u1ec7 tinh Sentinel-2"},"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-2<\/h4>\n\n\n\n

Sentinel-2 <\/mark>bao g\u1ed3m hai v\u1ec7 tinh gi\u1ed1ng h\u1ec7t nhau quay quanh c\u1ef1c \u0111\u01b0\u1ee3c \u0111\u1eb7t trong c\u00f9ng m\u1ed9t qu\u1ef9 \u0111\u1ea1o \u0111\u1ed3ng b\u1ed9 v\u1edbi m\u1eb7t tr\u1eddi, l\u1ec7ch pha nhau 180\u00b0 \u1edf \u0111\u1ed9 cao trung b\u00ecnh 786 km v\u1edbi s\u1ee9 m\u1ec7nh ch\u1ee5p \u1ea3nh \u0111a ph\u1ed5 v\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao nh\u1eb1m gi\u00e1m s\u00e1t s\u1ef1 thay \u0111\u1ed5i c\u1ee7a b\u1ec1 m\u1eb7t \u0111\u1ea5t<\/strong> th\u00f4ng qua h\u00ecnh \u1ea3nh v\u1ec1 th\u1ea3m th\u1ef1c v\u1eadt, l\u1edbp ph\u1ee7 \u0111\u1ea5t v\u00e0 n\u01b0\u1edbc<\/strong>, \u0111\u1ed3ng th\u1eddi cung c\u1ea5p th\u00f4ng tin cho c\u00f4ng t\u00e1c qu\u1ea3n l\u00fd n\u00f4ng nghi\u1ec7p, l\u00e2m nghi\u1ec7p, thi\u00ean tai, bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu, an ninh v\u00e0 \u1ee9ng ph\u00f3 kh\u1ea9n kh\u1ea5p<\/strong>.<\/p>\n\n\n\n

Hai v\u1ec7 tinh Sentinel-2A <\/mark>v\u00e0 Sentinel-2B<\/mark> l\u1ea7n l\u01b0\u1ee3t \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o qu\u1ef9 \u0111\u1ea1o v\u00e0o ng\u00e0y 23\/6\/2015 v\u00e0 ng\u00e0y 7\/3\/2017 b\u1eb1ng b\u1ec7 ph\u00f3ng Vega c\u1ee7a Ch\u00e2u \u00c2u v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng m\u1ed7i v\u1ec7 tinh n\u1eb7ng kho\u1ea3ng 1.2 t\u1ea5n.<\/p>\n\n\n

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\"\"
H\u00ecnh 1. V\u1ec7 tinh Sentinel-2.
(Ngu\u1ed3n: ESA)<\/figcaption><\/figure>\n<\/div>\n\n
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\"\"
H\u00ecnh 2. Gi\u1edbi thi\u1ec7u v\u1ec1 Sentinel-2.
(Ngu\u1ed3n: ESA)<\/figcaption><\/figure>\n<\/div>\n\n\n

Th\u00f4ng tin c\u01a1 b\u1ea3n c\u1ee7a Sentinel-2<\/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-2
(Lunch date<\/em>)<\/td>		Sentinel-2A: 23\/6\/2015
Sentinel-2B: 7\/3\/2017<\/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>		786 km<\/td><\/tr>
4 <\/td>G\u00f3c nghi\u00eang
Inclination<\/em>)<\/td>		98.6\u00b0<\/td><\/tr>
5<\/td>Chu k\u1ef3 l\u1eb7p
Cycle\/Revisit<\/em>)<\/td>		5 ng\u00e0y (2 v\u1ec7 tinh)<\/td><\/tr>
6<\/td>Gi\u1edd \u0111\u1ecba ph\u01b0\u01a1ng
(Local time<\/em>)<\/td>		10:30 AM<\/td><\/tr>
7<\/td>S\u1ee9 m\u1ec7nh
(Mission<\/em>)<\/td>		Gi\u00e1m s\u00e1t \u0111\u1ea5t v\u00e0 bi\u1ec3n,
L\u1eadp b\u1ea3n \u0111\u1ed3 thi\u00ean tai,
Quan s\u00e1t b\u0103ng bi\u1ec3n,
Ph\u00e1t hi\u1ec7n t\u00e0u thuy\u1ec1n.<\/td><\/tr>
8<\/td>Thi\u1ebft b\u1ecb \u0111i k\u00e8m
(Payload instruments<\/em>)<\/td>		MSI: Thi\u1ebft b\u1ecb \u0111a quang ph\u1ed5 (Multi-Spectral Instrument)<\/td><\/tr>
9<\/td>Tu\u1ed5i th\u1ecd thi\u1ebft k\u1ebf
(Design lifetime<\/em>)<\/td>		7 n\u0103m<\/td><\/tr>
10<\/td>Kh\u1ed1i l\u01b0\u1ee3ng
(Mass<\/em>)<\/td>		~1140 kg<\/td><\/tr>
11<\/td>K\u00edch th\u01b0\u1edbc
(Dimensions<\/em>)<\/td>		3.40 x 1.8 x 2.35m<\/td><\/tr>
12<\/td>C\u01a1 quan kh\u00f4ng gian
(Space agency<\/em>)<\/td>		ESA<\/a>, COM<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

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

C\u00e1c v\u1ec7 tinh Sentinel-2 <\/strong>mang theo m\u1ed9t thi\u1ebft b\u1ecb quang h\u1ecdc \u0111a ph\u1ed5 (MSI <\/strong>– MultiSpectral Instrument) do t\u1eadp \u0111o\u00e0n c\u00f4ng nghi\u1ec7p Astrium ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1edbi c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m:<\/p>\n\n\n\n