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AP_Baro.cpp: Add in notes for standard day model accuracy

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Ryan Beall 2022-01-31 14:31:38 -08:00 committed by Andrew Tridgell
parent 5dda9ac9d0
commit eb790c6c0b
1 changed files with 2 additions and 1 deletions
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libraries/AP_Baro/AP_Baro.cpp
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@ -403,7 +403,8 @@ float AP_Baro::get_sealevel_pressure(float pressure) const
{ {
float temp = C_TO_KELVIN(get_ground_temperature()); float temp = C_TO_KELVIN(get_ground_temperature());
float p0_sealevel; float p0_sealevel;
// This is an exact calculation that is within +-2.5m of the standard
// atmosphere tables in the troposphere (up to 11,000 m amsl).
p0_sealevel = 8.651154799255761e30f*pressure*powF((769231.0f-(5000.0f*_field_elevation_active)/temp),-5.255993146184937f); p0_sealevel = 8.651154799255761e30f*pressure*powF((769231.0f-(5000.0f*_field_elevation_active)/temp),-5.255993146184937f);
return p0_sealevel; return p0_sealevel;