Digital Development Strategy of Agricultural Planting and Breeding Enterprises Based on Intelligent Sensors

Table 1

Meaning and value of each symbol in the atmospheric data calculation.

Symbol	Significance	Standard value
	Sea level pressure	101.325 kPa
	Top tropospheric pressure value	22.632 kPa
	Atmospheric pressure at the top stratospheric altitude	5.47482 kPa
	Sea level temperature	288.15 K
	Top tropospheric temperature	216.65 K
	Tropospheric temperature decline rate	6.5 × 10-3°C/m
	Increasing rate of actinic layer temperature	1 × 10-3°C/m
HT	Top troposphere height	11000 m
HS	Stratospheric top height	20000 m
H	Height of top layer of photochemical layer	32004 m
g0	Sea level acceleration of gravity	9.80665
Ra	Gas constant	287.0529 J/K/kg
A0	Sea level sound velocity at standard air pressure and standard temperature	340.294 m/s