GPS原理及其用 GPS测量定位的误差源>对流层延迟>对流层 对流层( Troposphere) (电离层) (热层 Mesosphere(中间层) Stratosphere(同温层) hee(对流层) Table 1 Molar weights and approximate fractional volumes"of the major constituents of dry air Molar weight, Fractional Constituent g/kmol k volume unitless N 280134 0.78084 319988 0209476 Ar 39948 000934 COz 14.00995 0.000314 Ne 20.183 0.00001818 H 40026 0.00000524 83.30 0.00000114 or reference, at sea level and at 100%b humidity, the water vapor occupies roughl 17 by volume, but note that percent humidity varies considerably with both timeGPS原理及其应用 对流层（Troposphere） GPS测量定位的误差源 > 对流层延迟 > 对流层