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- W1966374013 abstract "The drag of artificial earth satellites is reconsidered in the light of recent studies of gas-surface interactions and atmospheric composition. Between heights of 140 and 400 km at times of low solar activity, or heights of 140 and 600 km at times of high solar activity, the drag coefficient is almost independent of height, and at present, because of the lack of decisive evidence, there is perhaps not sufficient reason to abandon the value of 2.2 which has been widely used in recent years for the drag coefficient. It must be recognized, however, that this value is subject to some uncertainty and may be too low, perhaps by as much as 10–15percent. At heights above 400 km (low solar activity) or 600 km (high solar activity) the drag coefficient increases with height, since both the degree of energy transfer and the molecular speed ratio decrease as the molecular weight of the atmosphere decreases. Cилa CoпppoтиBлeHия иCкyCCтBeHHыч CпyтHикoB зeмли BHoBь oбCyздaeтCя Ha oCHпoBaHии БoCлeдHич изyчeHий BзaимoдeйCтBия мeздy гaзaми и БoBepчHoCтью CпyтиHкa, a тaкзe и CoCтaBa aтмoCфepы. B гpaHицaч BыCoт oт 140 дo 400 км B пepиoды Cлaбoй CoлHeчHoй дeятeльHoCти, или BыCoт мeздy 140 и 600 км B пepиoды CильHoй CoλHeчHoй дeятeльHoCти, кoзффициeHт Cиλы CoпpoтиBлeHия He зaBиCит oт BыCoты, и BBидy HeдoCтaтoчHыч peшaющич дoкaзaтeльCтB, Heт CyщeCтBeHHыч oCHoBaHий oтбpoCить BeличиHy 2.2 для кoзффициeHтa Cилы CoпpoтиBлeHия, кoтopoй БoльзoBaлиCй B пoCлeдHиe гoды. Haдo oдHaкo ppизHaть, чтo BeличиHa этa яBляeтCя ppeдмeтoм Heкoтopыч CoмHeHий, т.к. BoзмoзHo, чтo oHa Cлишкoм Hизкa, пpимepHo Ha 1%. Ha BыCoтaч бoльшич, чeм 400 км (пpи Cлaбoй CoλHeчHoй дeятeльHoCти) и бoльшич, чeм 600 км (Бpи CильHoй CoлHeчHoй дeятeлHoCти), кoэффициeHт Cилы CoпpoтиBлeHия BoзpaCтaeт C BыCoтoю BBидy тoгo, чтo CтeпeHь пepeHoCa эHepгии и кoэффициeHт мoлeкyляpHoй CкopoCти yмeHьщaютCя C yмeHьщeHиeм мoлeкyляpHoгo BeCa aтмoCфepы." @default.
- W1966374013 created "2016-06-24" @default.
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- W1966374013 date "1965-10-01" @default.
- W1966374013 modified "2023-10-04" @default.
- W1966374013 title "Satellite drag coefficients" @default.
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- W1966374013 doi "https://doi.org/10.1016/0032-0633(65)90150-9" @default.
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