ztd 中文意思是什麼
ztd
解釋
簡單做-
Gps observation which is about 2km far away from radiosonde site is comparable to radiosonde with a absolute bias of 2. 13mm on precipitable water ( pw ) observation and 1. 28cm on zenith total delay ( ztd )
與常規探空觀測相比， gps測量的可降水量有很好的代表性。在相距2km時，兩種測量手段測量可降水量和總延遲量的平均絕對偏差分別為2 . 13mm和1 . 28cm 。 -
Mm5 has a ability of simulating zwd on the whole with a bias larger than zhd ' s, which manipulates the bias of ztd simulation. the increase of mm5 resolution can improve the ability of simulating and depicting zhd, zwd and pw distribution. kf, bm and grell parametric schemes have a close ability of simulating pw at the beginning of 10 - 11h integration of mm5 model, and then the prediction bias of pw increases obviously after 20 - 21h integration
在mm5模式24h積分的前10 11h ，選用kf 、 bm和grell三種積雲參數化方案模式對可降水量的預報偏差基本接近，對可降水量具有較好的預報能力，其後三種積雲參數化方案對可降水量的預報偏差差異增大，模式積分至20 21h后對可降水量的預報能力明顯減小。 -
12h - simulation of mm5 can show the daily change tendency of ztd, zhd, zwd and pw with a bias in depicting their hourly change
Mm5模式解析度的提高有利於改善模式對靜力延遲、濕延遲和可降水量的描述和預報。 -
2. the reanalysis fields of mm5 can reveal the distribution of zhd as a whole and has larger bias on zwd and pw than ztd
2 、 mm5模式初始場對靜力延遲有較好的描述能力，但對濕延遲和可降水量的描述還存在比靜力延遲更大的描述誤差。 -
The variation of ztd is mainly caused by the zenith wet delay ( zwd ). zenith hydrostatic delay ( zhd ) and zwd from different gps sites exhibit individual features that zhd has a obvious periodic change and zwd is related to weather
總延遲的變化主要是由濕延遲的變化而引起，其中靜力延遲變化呈現了明顯的周期性，而濕延遲的變化與天氣過程相關聯。
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