#ifndef ATMOSPHERE_H
#define ATMOSPHERE_H

#ifdef __cplusplus
extern "C" {
#endif

/* Returns atmospheric density (kg/m^3) at the given altitude (m).*/
double US_STD_density ( double alt_m ); 

/* Returns acceleration of gravity (m/s^2) at the given altitude (m).*/
double US_STD_gravity( double alt_m);

/* Returns atmospheric temperature (℃) at the given altitude (m).*/
double US_STD_temperature( double alt_m );

/* Returns atmospheric pressure (pascals) at the given altitude (m).*/
double US_STD_pressure( double alt_m);

#ifdef __cplusplus
}
#endif

#endif