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To: Valueman who wrote (5275)	2/5/1999 11:45:00 AM
From: Mr. Adrenaline	Respond to of 10852

The period of the CD Radio orbit is 24 hours, just like a GEO. What is different is that it is inclined to something like 30~50 degrees. I can't remember the exact number, sorry. GEO are exactly above the equator. Also, GEO's are a circular orbit, where CD Radio is highly elliptical. I would guess that they have a web page that tells you exactly what the inclination and the eccentricity is, but, I have never looked. The idea is that the look angles are much better, and that when the satellites are over CONUS, they have a longer "hang" time because they are out at apogee. If you don't understand what I just said, just trust me it's a good thing. Mr A

To: Valueman who wrote (5275)	2/5/1999 12:57:00 PM
From: Jeff Vayda	Read Replies (1) \| Respond to of 10852

Vman just a quick run down on Molniya orbits. Here's the best picture I could find: pentriad.com of a Molniya Orbit A Molniya orbit is a specific form of a highly elliptical, semisynchronous orbit. It has a 64 inclination, 0.7 eccentricity, and perigee over the southern hemisphere. A satellite in a Molniya orbit spends 11.7 hours of its 12 hour period in the northern hemisphere. This makes the Molniya orbit well suited for communications satellites intended to provide coverage in the extreme north where access to geostationary satellite is generally not feasible. (From fas.org and another explaination at fas.org Molniya is also a class of satellites and launch vehicles (basically a 4 stage Soyuz) all from the design bureau of the same name! Jeff Vayda