Full
ZHU Huizhong, PhD, professor, majors in high-precision GNSS positioning, E-mail: zhuhuizhong@lntu.edu.cn
Outline
In order to improve the accuracy of ZTD model, a fine-scale stratification ZTD (ZTDFS) model in China is proposed. The new model is finely stratified below 10 km and takes into account the seasonal and daily variation characteristics of each layer. At the same time, the model also fully considers the spatiotemporal variation of the vertical lapse rate of third-order exponential function. The radiosonde data shows that the mean RMSE of ZTDFS model is 31.43 mm, which is 36.6% smaller than that of GPT3 model. The GNSS ZTD data shows that above 500 m, the mean RMSE of ZTDFS model is 28.64 mm, which is improved by 9% compared to GPT3. With the increase in altitude, the performance advantage of ZTDFS model gradually emerges.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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