# LOWER ATMOSPHERE STATE PROPERTIES
# FROM THE PIONEER VENUS SOUNDER PROBE
#
# BASED ON MERGED DATA FROM P A AND P B PRESSURE SENSORS,  T 1 AND T 2 TEMPERATURE SENSORS.
# DATA ARE LISTED AT 4 SEC INTERVALS PRIOR TO TEMPERATURE SENSOR BREAKDOWN AT
# 13.1 KM, THEN, AT 32 SEC INTERVALS.
# G0 IS GROUND LEVEL ACCELERATION DUE TO GRAVITY, AT THE LANDING SITE
# R0 IS PLANETARY RADIUS AT THE LANDING SITE PLUS OR MINUS 0.25 KM
# ALTITUDE IS ABOVE LANDING SITE
# MW IS ATMOSPHERIC MEAN MOLECULAR WEIGHT (INPUT)
# ZETA IS REAL GAS COMPRESSIBILITY FACTOR = P/(RHO X R T)
# ESTIMATED ABSOLUTE ACCURACIES: ON P, RHO........0.5% OF READING
#                                ON T.............1 K
#                                ON ALTITUDE......0.4% OF READING                    
# GRT (HR:MIN) IS CORRECT TO NEAREST .06 SEC. GRT (SEC) IS ROUNDED TO NEAREST SEC.
# DESCENT VELOCITY RANGES FROM 39 TO 12 M/S ON PARACHUTE, 53 TO 11 M/S IN FREE FALL.                                                                                
# PARACHUTE JETTISON AT 45.4 KM, 19:06.3 GRT
#
# LOWER ATMOSPHERE STATE PROPERTIES
# FROM THE PIONEER VENUS SOUNDER PROBE
# A. SEIFF, P.I.
# R0 = 6052.0 KM
# G0 = 8.8694 M/SEC2
# MW = 43.44
# GRT(HR:MIN),GRT(SEC),ALT(KM),P(BARS),T(DEG K),RHO(KG/M3),ZETA