function?[Z?Z_L?Z_U?T?P?rho?c?g?mu?nu?k?n?n_sum]?=?atmo（altdivisionunits）
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%???Program:????1976?Standard?Atmosphere?Calculator[0-1000?km]
%???Author:?????Brent?Lewis（RocketLion@gmail.com）
%???????????????University?of?Colorado-Boulder
%???History:????Original-1/10/2007
%???????????????Revision-1/12/2007-Corrected?for?changes?in?Matlab?versions
%???????????????for?backward?compatability-Many?thanks?to?Rich
%???????????????Rieber（rrieber@gmail.com）
%???Input:??????alt:????????Final?Geometric?Altitude[km]
%???????????????division:???Reporting?points?for?output?arrays[km]
%???????????????????????????（.01?km?&?Divisible?by?.01?km）
%???????????????units:??????1-[Metric]
%???????????????????????????2-{English}
%???Default:????Values?used?if?no?input
%???????????????alt:????????1000?km
%???????????????division:???1?km
%???????????????units:??????Metric
%???Output:?????Each?value?has?a?specific?region?that?it?is?valid?in?with?this?model
%???????????????and?is?only?printed?out?in?that?region
%???????????????Z:??????????Total?Reporting?Altitudes[0<=alt<=1000?km][km]{ft}
%???????????????Z_L:????????Lower?Atmosphere?Reporting?Altitudes[0<=alt<=86?km][km]{ft}
%???????????????Z_U:????????Upper?Atmosphere?Reporting?Altitudes[86<=alt<=1000?km][km]{ft}
%???????????????T:??????????Temperature?array[0<=alt<=1000?km][K]{R}
%???????????????P:??????????Pressure?array[0<=alt<=1000?km][Pa]{in_Hg}
%???????????????rho:????????Density?array[0<=alt<=1000?km][kg/m^3]{lb/ft^3}
%???????????????c:??????????Speed?of?sound?array[0<=alt<=86?km][m/s]{ft/s}
%???????????????g:??????????Gravity?array[0<=alt<=1000?km][m/s^2]{ft/s^2}
%???????????????mu:?????????Dynamic?Viscosity?array[0<=alt<=86?km][N*s/m^2]{lb/（ft*s）}
%???????????????nu:?????????Kinematic?Viscosity?array[0<=alt<=86?km][m^2/s]{ft^2/s}
%???????????????k:??????????Coefficient?of?Thermal?Conductivity
%???????????????????????????array[0<=alt<=86?km][W/（m*K）]{BTU/（ft*s*R）}
%???????????????n:??????????Number?Density?of?individual?gases
%???????????????????????????（N2?O?O2?Ar?He?H）[86km<=alt<=1000km][1/m^3]{1/ft^3}
%???????????????n_sum:??????Number?Density?of?total?gases
%???????????????????????????[86km<=alt<=1000km][1/m^3]{1/ft^3}
%???Acknowledgements:???????1976?U.S.?Standard?Atmosphere
%???????????????????????????Prof.?Adam?Norris-Numerical?Analysis?Class
%???????????????????????????Steven?S.?Pietrobon?USSA1976?Program
%???Notes:??????????????????Program?uses?a?5-point?Simpson‘s?Rule?in?10
%???????????????????????????meter?increments.??Results?DO?vary?by?less?1%
%???????????????????????????compared?to?tabulated?values?and?is?probably
%???????????????????????????caused?by?different?integration?techniques
%???Examples:???????????????atmo（）?will?compute?the?full?atmosphere?in?1?km
%???????????????????????????increments?and?output?in?Metric?Units
%???????????????????????????atmo（10）?will?compute?