Table 2.1 Properties of various operational observing systems. Error Observing Fields Random error Remarks Time Coverage Vertical Horizontal Comments and system observed resolution resolution resolution (reports/day) Surface land PS ±0.5 mb 3 50 km high resolution over – ≥ – ≥ stations TS ±1°C most land areas. 4,095 VS ±1.5 3 m/s of 9,500 stations in – locations). WWW (20,000/day; in rhS ±10% 1992) (27,500 metar/day; in 2000)
Table 2.1 Properties of various operational observing systems. Error Observing system Fields observed Random error Remarks Time resolution Coverage Vertical resolution Horizontal resolution Comments and (reports/day) Surface land stations PS TS VS rhS ±0.5 mb ±1°C ±1.5 – 3 m/s ±10% – ≥ 3 locations). – ≥ 50 km high resolution over most land areas. 4,095 of 9,500 stations in WWW (20,000/day; in 1992) (27,500 metar/day; in 2000)
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