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CloudFlare makes wide use of Anycast.

Catch a *Flaring/Glinting Iridium

The protocol allows routers in multiple different facilities to announce the same IP addresses. The network then chooses the route that is shortest when transiting the Internet. This both helps us ensure visitors reach the data center that is closest to them and also allows us to better mitigate DDoS and other attacks. The challenge of Anycast is the network routing. It takes significant work to make sure that traffic for a particular region stays in the right place and that connections don't "flap" between multiple facilities.

Tom and Terry, who head our network ops team, have been working hard over the last few weeks to ensure that as we continue to add more data centers and transit providers our network remains rock solid. It is the maintenance of the operational satellite's axial and longitudinal position that allows the flares to be predicted. Details of the purchase can be found at SpaceFlightNow. Tentatively planned was a launch in late by a Delta II with five satellites. The launch date was later moved to early There is also a Russian launch tentatively planned in June with two satellites.

The goal is to maintain 6 orbital planes with 11 operable satellites per plane along with two or more spares per plane. The plate or MMA can provide a direct specular reflection of the sun's disk. This specular reflection is only tens of kilometers wide at the Earth's surface. In order to see a very bright reflection, the observer must be within this relatively small area.

Prague, Czech Republic: CloudFlare's 20th Data Center

Prediction programs are available to determine this area. The three sided similar to an equilateral triangle satellites themselves are not very large, approximately 4 meters long and less than one meter in width.

Making Fender Flares For The 240z l Part 1 The Plug (Ep #20)(4K)

Alan Rohwer, a SeeSat-L subscriber, provided the initial construction details and provides additional information on the construction of the satellite which may account for unexplained reflections not predicted by the flaring prediction programs. A fully operational Iridium satellite maintains its axial and longitudinal position to within very close tolerances.

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Knowing the satellite's position, its orientation, the relative Sun angle to the satellite, the reflective properties of a mirror and the observers position on Earth, a program can be developed to calculate the projected specular reflection of the Sun from the Main Mission Antennas to an observer. Rob Matson provides additional information in a response on SeeSat-L. Rob Matson and Randy John have developed software aimed at predicting these events. In addition, Rob Matson's windows program SkyMap 6.

Since several Iridium satellites listed below are either tumbling or otherwise not operational, those can NOT be predicted.

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The mean motion that signals a fully operational satellite should be Heavens-Above in Munich, Germany now provides flare predictions. Because the flare effect is fairly local in nature, the user should provide their best known coordinates in order to observe the flare successfully.

Prague, Czech Republic: CloudFlare's 20th Data Center

This site has a large coordinate database to allow the user to determine their coordinates. Observations and comments posted by SeeSat-L subscribers can be found either in the archives or by joining the SeeSat-List. Below is a listing of all the Iridium satellites assigned to their respective orbital planes.

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Motorola had provided an official list of Iridium Satellite Nomenclature on or before December 17, Motorola is no longer involved in the maintainance of the satellite orbits. The Boeing Company is now providing this service. There are now 6 separate orbital planes of operational satellites spaced approximately 30 degrees apart. There are three categories of satellite identification. First is the satellite catalog number , the international designation , and the common name number. Iridium 79 inoperable was the first satellite in the constellation to reenter.

Iridium 85 inoperable was the second satellite to reenter on Dec 31, Iridium 48 inoperable was the third satellite to reenter on May 5,