Bonjour à tous et bienvenue sur ce Gitlab. Pour échanger avec ses autres utilisateurs, posez vos questions ou trouver des ressources, vous pouvez rejoindre le canal suivant : https://chat.univ-eiffel.fr/channel/forges-logicielles-github-et-gitlab-universite-gustave-eiffel

Skip to content

Changes

Page history
Update GPS authored by Hugo Cueff's avatar Hugo Cueff
Hide whitespace changes
Inline Side-by-side
GPS.md
View page @ 5c2dfe00
...@@ -10,7 +10,7 @@ Commercially, GPS has been very successful and has led to numerous developments ...@@ -10,7 +10,7 @@ Commercially, GPS has been very successful and has led to numerous developments
**SCIENCE** **SCIENCE**
Today the constellation of 30 satellites is composed of different generations (all transmitting the same signals): 7 from the IIR block (1997-2004), 7 from the IIR(M) block (2005-2009), 12 from the IIF block (2010-2016) and 4 from the III block. Today the constellation of **30 satellites** is composed of different generations (all transmitting the same signals): 7 from the IIR block (1997-2004), 7 from the IIR(M) block (2005-2009), 12 from the IIF block (2010-2016) and 4 from the III block.
- **IIR block :** They can transmit messages to each other without any ground contact, allowing system operators to communicate with satellites that are inaccessible to them in direct communication. They are equipped with three rubidium atomic clocks. Twenty-one Block IIR satellites have been launched, the last on 17 August 2009. The last eight are designated IIR-M (Modernized) because they transmit a new civilian code (L2C) on the L2 frequency and new military codes (M) on the L1 and L2 frequencies. - **IIR block :** They can transmit messages to each other without any ground contact, allowing system operators to communicate with satellites that are inaccessible to them in direct communication. They are equipped with three rubidium atomic clocks. Twenty-one Block IIR satellites have been launched, the last on 17 August 2009. The last eight are designated IIR-M (Modernized) because they transmit a new civilian code (L2C) on the L2 frequency and new military codes (M) on the L1 and L2 frequencies.
- **IIF block :** These satellites were built by Boeing and are 12 in number, the first in the series was launched in May 2010, the last in February 2016. These satellites transmit a new civilian signal on the L5 frequency, which allows the start of dual-frequency position calculations. - **IIF block :** These satellites were built by Boeing and are 12 in number, the first in the series was launched in May 2010, the last in February 2016. These satellites transmit a new civilian signal on the L5 frequency, which allows the start of dual-frequency position calculations.
......