Low Earth Orbit (LEO satellites )

Low Earth Orbit (LEO satellites )
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LEO ????? ??????? ??????????????? ????????? ??? ?? ???? ?????? ??????????? ?????? Lower orbit ??? ???????????? satellite ???????????????? ????????? ???????????? 95 -120 ??????????? ????????????? ?????? ?????????????? ?????? ?? ????? ??????????? ????? ????? ????????????? ??? ????? LEO Sat ??????? ??????????????????? ???????? High Elevation ???????????? ????????? ??????????????????? ??????? High quality communication link ???? ??? ???????? ??????????
???????? ??????????????????? Data Compression Schemes ????????????????????? 2400 bit/s ??????????? ??????????? ??????????????? ????? ??????????? Compression ??????? ????????????? LEOs ????? Omni-directional (????? ?????????? ???????? ?????? ????? ??? ?????? ?????????? ?????????) ?????????? Mobile Phone Devices ???? ?????? ????????????? ??????????? ?????? ??????????????? ??????????? ???????????? Transmit Power 1W ?? ??????????????? ????????? ?????? Delay rate ????? 10 ms ?? ??????????? ?????? Long-distance wired connection (delay 5-10) ????????? ????????? ???????????????????????? Footprint ??? ?? ???????????????? frequency ??? ????????????????????? ????????????????????????? Cellular Network ?????? ????????????? ???????????????????? LEOs ????? GEOs ??? ?????????????????? ??????????????? ?????? ?? ????????????????????????? ??????? ??????????? ??????????????? ??? ?????? ????????????????????
LEO Satellites ?????? Remote sensing ??? Mobile communication ???????? ???????? ???? ?????????????
???????????????????? ??????? ????????????????? ??????????????????? ???????????? ???????????????? Footprint ?????? ???????????????? Global Coverage ???????? LEOs ??? ???????????????? ??? ?????? ?????????? Global Coverage ???????? ISL (inter satellite link ) ???????? ????????????? LEOs ??????????? Routing Function ???????? interconnecting ????????????????? ???????? ???????? ???????????????? ???????????????? ????????? LEOs ?????? ????????? ??????????????? ??????????????? ??????? ?????????? ? The inner Van Allen belt1(????????? ????????????? Post ??? ???????? ??????? ???????? ? ??? ?????????????????? http://www.britannica.com/EBchecked/topic/622563/Van-Allen-radiation-belt ) ??? Radiation ????????????????? ??????????????? ? ?????? ? ???? ??????? ??????????? ?????????????????? LEO Satellites ?? ?????? ?????????? ? ???? ?????????????????? ??????????? ??????????? ??????????? ??????????? ???????????? ?????????????? ???????????? ?? ????????????? ??????????? ? LEOs ??? Data Routing ????? ?????????????????????????????? ? ???????????????? ?????????????? GEO ????? Footprint ???????????????? ??????????????? Routing ?????????? ??????????????? Sender ??? Receiver ? Footprint ???????????? ????????????????????

 
 
 

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