{"id":4378,"date":"2024-05-23T10:00:00","date_gmt":"2024-05-23T03:00:00","guid":{"rendered":"https:\/\/opengis.vn\/?p=4378"},"modified":"2024-06-04T10:34:50","modified_gmt":"2024-06-04T03:34:50","slug":"gioi-thieu-ve-ve-tinh-sentinel-6-michael-freilich","status":"publish","type":"post","link":"https:\/\/opengis.vn\/en\/blog\/gioi-thieu-ve-ve-tinh-sentinel-6-michael-freilich\/","title":{"rendered":"Gi\u1edbi thi\u1ec7u v\u1ec1 v\u1ec7 tinh Sentinel-6 Michael Freilich"},"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-6 Michael Freilich<\/h4>\n\n\n\n

Sentinel-6<\/mark> l\u00e0 s\u1ee9 m\u1ec7nh v\u1ec7 tinh v\u1edbi nhi\u1ec7m v\u1ee5 \u0111o l\u01b0\u1eddng \u0111\u1ed9 cao m\u1ef1c n\u01b0\u1edbc bi\u1ec3n to\u00e0n c\u1ea7u<\/strong> nh\u01b0 th\u1eddi gian th\u1ef1c<\/strong>, chi\u1ec1u cao s\u00f3ng<\/strong>, ph\u1ee5c v\u1ee5 ho\u1ea1t \u0111\u1ed9ng h\u1ea3i d\u01b0\u01a1ng h\u1ecdc v\u00e0 nghi\u00ean c\u1ee9u kh\u00ed h\u1eadu. V\u1edbi m\u1ed1i \u0111e d\u1ecda m\u1ef1c n\u01b0\u1edbc bi\u1ec3n d\u00e2ng \u0111\u1ed1i v\u1edbi c\u00e1c qu\u1ed1c gia s\u1ed1ng ven bi\u1ec3n, s\u1ee9 m\u1ec7nh v\u1ec7 tinh Sentinel-6 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n v\u00e0 \u0111\u1ed3ng t\u00e0i tr\u1ee3 b\u1edfi \u1ee6y ban Ch\u00e2u \u00c2u, ESA, EUMETSAT v\u00e0 Hoa K\u1ef3, th\u00f4ng qua NASA v\u00e0 C\u01a1 quan Kh\u00ed quy\u1ec3n v\u00e0 \u0110\u1ea1i d\u01b0\u01a1ng Qu\u1ed1c gia (NOAA).<\/p>\n\n\n\n

S\u1ee9 m\u1ec7nh n\u00e0y bao g\u1ed3m 2 v\u1ec7 tinh \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf bay tu\u1ea7n t\u1ef1, trong \u0111\u00f3, v\u1ec7 tinh \u0111\u1ea7u ti\u00ean Copernicus Sentinel-6 Michael Freilich<\/mark>, \u0111\u01b0\u1ee3c ph\u00f3ng v\u00e0o ng\u00e0y 21 th\u00e1ng 11 n\u0103m 2020 tr\u00ean t\u00ean l\u1eeda SpaceX Falcon 9 t\u1eeb Vandenberg, California, Hoa K\u1ef3. V\u1ec7 tinh th\u1ee9 hai d\u1ef1 ki\u1ebfn s\u1ebd \u0111\u01b0\u1ee3c ph\u00f3ng sau 5 n\u0103m (2025). C\u00e1c v\u1ec7 tinh ho\u1ea1t \u0111\u1ed9ng theo qu\u1ef9 \u0111\u1ea1o kh\u00f4ng \u0111\u1ed3ng b\u1ed9 v\u1edbi m\u1eb7t tr\u1eddi \u1edf \u0111\u1ed9 cao trung b\u00ecnh 1336 km, nghi\u00eang 66\u00b0 v\u1edbi chu k\u1ef3 l\u1eb7p l\u1ea1i 10 ng\u00e0y tr\u00f9ng v\u1edbi chu k\u1ef3 c\u1ee7a Jason-3 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea3n ghi d\u1eef li\u1ec7u \u0111o \u0111\u1ed9 cao d\u00e0i h\u1ea1n thu \u0111\u01b0\u1ee3c tr\u00ean qu\u1ef9 \u0111\u1ea1o n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c ti\u1ebfp t\u1ee5c v\u00e0o nh\u1eefng n\u0103m 2030.<\/p>\n\n\n\n

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H\u00ecnh 1. V\u1ec7 tinh Sentinel 6.
(Ngu\u1ed3n: EUMETSAT\/ESA)<\/figcaption><\/figure>\n\n\n\n

Th\u00f4ng tin c\u01a1 b\u1ea3n c\u1ee7a Sentinel-6 Michael Freilich<\/h4>\n\n\n\n
TT<\/th>Th\u00f4ng tin nhanh<\/th>Ghi ch\u00fa<\/th><\/tr><\/thead>
1 <\/td>Ng\u00e0y ra m\u1eaft Sentinel 6 (Lunch date<\/em>)<\/td>21\/11\/2020<\/td><\/tr>
2 <\/td>Qu\u1ef9 \u0111\u1ea1o (Orbit<\/em>)<\/td>Kh\u00f4ng \u0111\u1ed3ng b\u1ed9 m\u1eb7t tr\u1eddi<\/td><\/tr>
3 <\/td>\u0110\u1ed9 cao qu\u1ef9 \u0111\u1ea1o (Altitude<\/em>)<\/td>1,336 km<\/td><\/tr>
4 <\/td>G\u00f3c nghi\u00eang (Inclination<\/em>)<\/td>66\u00b0 <\/td><\/tr>
5<\/td>Chu k\u1ef3 l\u1eb7p (Cycle\/Revisit<\/em>)<\/td>10 ng\u00e0y<\/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>\u0110o \u0111\u1ed9 cao n\u01b0\u1edbc bi\u1ec3n
\u0110o chi\u1ec1u cao s\u00f3ng<\/td><\/tr>
8<\/td>Thi\u1ebft b\u1ecb \u0111i k\u00e8m (Payload instruments<\/em>)<\/td>C\u00e1c thi\u1ebft b\u1ecb \u0111i k\u00e8m Sentinel-6:
+ POS-4<\/strong> (Poseidon-4)
<\/strong>+ AMR-C
+<\/strong><\/strong> REM<\/strong>
+ GNSS-RO<\/strong>
+ LRA<\/strong> <\/strong>(POD package)
+ <\/strong>GNSS-POD <\/strong>(POD package)
+ DORIS<\/strong><\/strong> (POD package)<\/td><\/tr>
9<\/td>Tu\u1ed5i th\u1ecd thi\u1ebft k\u1ebf (Design lifetime<\/em>)<\/td>5.5 n\u0103m<\/td><\/tr>
10<\/td>Kh\u1ed1i l\u01b0\u1ee3ng (Mass<\/em>)<\/td>1,191kg (1,440 kg bao g\u1ed3m nhi\u00ean li\u1ec7u)<\/td><\/tr>
11<\/td>K\u00edch th\u01b0\u1edbc (Dimensions<\/em>)<\/td>5.13m x 4.17m x 2.34m (c\u1ea5u h\u00ecnh tr\u00ean qu\u1ef9 \u0111\u1ea1o)<\/td><\/tr>
12<\/td>C\u01a1 quan kh\u00f4ng gian (Space agency<\/em>)<\/td>EUMETSAT<\/a> , CNES<\/a>, EC<\/a>, ESA<\/a>, NASA<\/a>, NOAA<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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H\u00ecnh 2. M\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c c\u01a1 quan kh\u00f4ng gian.
(Ngu\u1ed3n: eoPortal)<\/figcaption><\/figure>\n\n\n\n

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

M\u1ed7i v\u1ec7 tinh Sentiel-6 n\u1eb7ng 1,191 kg, mang theo c\u00e1c thi\u1ebft b\u1ecb:<\/p>\n\n\n\n

TT <\/th>C\u00e1c thi\u1ebft b\u1ecb ch\u00ednh <\/th>Vai tr\u00f2 <\/th><\/tr><\/thead>
1 <\/td>Poseidon-4
<\/strong>M\u00e1y \u0111o \u0111\u1ed9 cao kh\u1ea9u \u0111\u1ed9 t\u1ed5ng h\u1ee3p h\u01b0\u1edbng \u0111i\u1ec3m b\u0103ng t\u1ea7n Ku v\u00e0 C (SAR ch\u1ec9 \u1edf b\u0103ng t\u1ea7n Ku)<\/td>		Poseidon-4 l\u00e0 thi\u1ebft b\u1ecb tr\u1ecdng y\u1ebfu nh\u1ea5t c\u1ee7a v\u00ea tinh Sentinel-6 trong c\u00f4ng t\u00e1c \u0111\u00f4 \u0111\u1ed9 cao m\u1ef1c n\u01b0\u1edbc bi\u1ec3n, ti\u1ebfp n\u1ed1i s\u1ee9 m\u1ec7nh c\u1ee7a Sentinel-3. Tr\u00ean \u0111\u1ea1i d\u01b0\u01a1ng, s\u1ee9 m\u1ec7nh CryoSat c\u1ee7a ESA v\u00e0 g\u1ea7n \u0111\u00e2y l\u00e0 s\u1ee9 m\u1ec7nh Copernicus Sentinel-3 \u0111\u00e3 ch\u1ee9ng minh r\u1eb1ng ph\u00e9p \u0111o \u0111\u1ed9 cao \u1edf ch\u1ebf \u0111\u1ed9 SAR mang l\u1ea1i s\u1ef1 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 (gi\u1ea3m ti\u1ebfng \u1ed3n ng\u1eabu nhi\u00ean theo h\u1ec7 s\u1ed1 ~ 3 so v\u1edbi ch\u1ebf \u0111\u1ed9 LRM) \u0111\u1ed1i v\u1edbi c\u1ea3 ti\u1ebfng \u1ed3n ph\u1ea1m vi v\u00e0 ph\u00e9p \u0111o \u03c30.
B\u0103ng t\u1ea7n Ku c\u00f3 b\u01b0\u1edbc s\u00f3ng t\u1eeb 12 t\u1edbi 18 GHz, b\u1eb1ng t\u1ea7n C c\u00f3 b\u01b0\u1edbc s\u00f3ng t\u1eeb 4 t\u1edbi 8 GHz.<\/td><\/tr>
2 <\/td>AMR-C<\/strong>
(A multi-frequency Advanced Microwave Radiometer for Climate<\/em>)
M\u00e1y \u0111o ph\u00f3ng x\u1ea1 vi s\u00f3ng n\u00e2ng cao \u0111a t\u1ea7n s\u1ed1 cho kh\u00ed h\u1eadu<\/td>		Bao g\u1ed3m M\u00e1y \u0111o ph\u00f3ng x\u1ea1 vi s\u00f3ng \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao (High-Resolution Microwave Radiometer – HRMR<\/strong><\/em>) th\u1eed nghi\u1ec7m \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng c\u00e1c ph\u00e9p \u0111o c\u00e1c th\u00f4ng s\u1ed1 kh\u00ed quy\u1ec3n \u1edf v\u00f9ng ven bi\u1ec3n.
Thi\u1ebft b\u1ecb AMR-C cung c\u1ea5p kh\u1ea3 n\u0103ng hi\u1ec7u ch\u1ec9nh \u0111\u1ed9 suy gi\u1ea3m kh\u00ed quy\u1ec3n c\u1ee7a t\u00e1n x\u1ea1 ng\u01b0\u1ee3c b\u1ec1 m\u1eb7t m\u00e1y \u0111o \u0111\u1ed9 cao do m\u01b0a, m\u00e2y v\u00e0 h\u01a1i n\u01b0\u1edbc, \u0111\u1ed3ng th\u1eddi gi\u00fap n\u00e2ng cao \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a c\u00e1c ph\u00e9p \u0111o cao<\/strong> tr\u00ean thi\u1ebft b\u1ecb Poseidon-4.<\/td><\/tr>
3 <\/td>POD <\/strong>
(A Precise Orbit Determination<\/em>)
B\u1ed9 thi\u1ebft b\u1ecb x\u00e1c \u0111\u1ecbnh qu\u1ef9 \u0111\u1ea1o ch\u00ednh x\u00e1c<\/td>		Bao g\u1ed3m H\u1ec7 th\u1ed1ng v\u1ec7 tinh d\u1eabn \u0111\u01b0\u1eddng to\u00e0n c\u1ea7u (GNSS<\/strong>), m\u1ea3ng ph\u1ea3n x\u1ea1 laze (LRA<\/strong>) v\u00e0 H\u1ec7 th\u1ed1ng \u0111\u1ecbnh v\u1ecb v\u00f4 tuy\u1ebfn qu\u1ef9 \u0111\u1ea1o Doppler \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p b\u1edfi v\u1ec7 tinh (DORIS<\/strong>).<\/td><\/tr>
4 <\/td>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n v\u00f4 tuy\u1ebfn c\u1ee7a GNSS-RO<\/strong><\/td>Cung c\u1ea5p th\u00f4ng tin c\u1ea5u h\u00ecnh d\u1ecdc c\u1ee7a kh\u00ed quy\u1ec3n.<\/td><\/tr>
5<\/td>REM <\/strong>
(Radiation Environment Monitor<\/em>)
C\u1ea3m bi\u1ebfn Gi\u00e1m s\u00e1t M\u00f4i tr\u01b0\u1eddng B\u1ee9c x\u1ea1<\/td>		\u0110\u1ec3 \u0111o m\u00f4i tr\u01b0\u1eddng b\u1ee9c x\u1ea1 kh\u00f4ng gian t\u1ea1i ch\u1ed7.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n
\n
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H\u00ecnh 3. C\u00e1c thi\u1ebft b\u1ecb c\u1ea3m bi\u1ebfn tr\u00ean v\u1ec7 tinh Sentine-6.
(Ngu\u1ed3n: ESA)<\/figcaption><\/figure><\/div>\n\n\n

S\u1ee9 m\u1ec7nh Sentinel-6 l\u00e0 s\u1ef1 h\u1ee3p t\u00e1c qu\u1ed1c t\u1ebf trong vi\u1ec7c ph\u00e1t tri\u1ec3n v\u00e0 v\u1eadn h\u00e0nh, trong \u0111\u00f3 c\u00e1c thi\u1ebft b\u1ecb:<\/p>\n\n\n\n