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| . [[ https://sci.esa.int/web/cluster/-/40994-cluster-reveals-the-reformation-of-the-earth-s-bow-shock | Bow shock approximately 90,000 km, highly variable ]] | . [[ https://sci.esa.int/web/cluster/-/40994-cluster-reveals-the-reformation-of-the-earth-s-bow-shock | Bow shock approximately 90,000 km, highly variable ]] . The bow shock distance drops below 10 Re many times per year. === One Sidereal Day Construction orbit and associated plumes === A 1 sidereal day construction orbit with a perigee radius of 8378 km ( 6378 + 2000 ) and an apogee radius of 75950 km ( 2*42164 - 8378 ) has an apogee of 11.9 Re. Retrograde plumes for apogee orbit insertion will all orbit above the bow shock (and be exposed to the proton flux of the solar wind) many times per year. Two relevant related orbits will be a launch orbit from a perigee radius of 6458 km, and a HEEO to GEO/Laplace transfer orbit with a perigee radius of 42164 km (Ignoring J₂ gravitational effects): || ||<-3> Radius km ||<-4> Velocity km/s || || Orbit || Perigee || Apogee || Semimajor || Perigee || Apogee || Semimajor || Delta V || || Launch || 6458 || 75950 || 41204 || 10.666 || 0.907 || 3.110 || 10.190 perigee prograde || || Construction HEEO || 8378 || 75950 || 42164 || 9.257 || 1.021 || 3.075 || 0.114 apogee prograde || || GEO Transfer || 42164 || 75950 || 59057 || 3.487 || 1.936 || 2.598 || 0.915 apogee prograde || || GEO || 42164 || 42164 || 42164 || 3.075 || 3.075 || 3.075 || 0.412 perigee retrograde || |
Magnetosphere
https://ccmc.gsfc.nasa.gov/educational/MagnetosphereWebPage.php
- The bow shock distance drops below 10 Re many times per year.
One Sidereal Day Construction orbit and associated plumes
A 1 sidereal day construction orbit with a perigee radius of 8378 km ( 6378 + 2000 ) and an apogee radius of 75950 km ( 2*42164 - 8378 ) has an apogee of 11.9 Re. Retrograde plumes for apogee orbit insertion will all orbit above the bow shock (and be exposed to the proton flux of the solar wind) many times per year. Two relevant related orbits will be a launch orbit from a perigee radius of 6458 km, and a HEEO to GEO/Laplace transfer orbit with a perigee radius of 42164 km (Ignoring J₂ gravitational effects):
|
Radius km |
Velocity km/s |
|||||
|| Orbit || Perigee || Apogee || Semimajor || Perigee || Apogee || Semimajor || Delta V ||
Launch |
6458 |
75950 |
41204 |
10.666 |
0.907 |
3.110 |
10.190 perigee prograde |
Construction HEEO |
8378 |
75950 |
42164 |
9.257 |
1.021 |
3.075 |
0.114 apogee prograde |
GEO Transfer |
42164 |
75950 |
59057 |
3.487 |
1.936 |
2.598 |
0.915 apogee prograde |
GEO |
42164 |
42164 |
42164 |
3.075 |
3.075 |
3.075 |
0.412 perigee retrograde |