Full
Outline
Aiming at the problems that approximate solution accuracy of the existing coordinate mean method is insufficient, and the conversion relationship between image coordinate system and tangent plane coordinate system of celestial sphere cannot be applied to large field of view, we develop an algorithm model for precise calculation of astronomical coordinates of rotation axis of zenith camera with ultra-large field of view. Based on the shafting deviation between the main optical axis and rotation axis, we construct a spherical triangle pointing to the north celestial pole and the two shafting systems, and construct a precise solution model of astronomical coordinates pointing to rotation axis based on spherical coordinates. The simulation results show that when the latitude coordinate pointed by the main optical axis is less than 80°, the calculation error of latitude coordinate is less than 1″, the calculation error of azimuth angle is less than 5″ and the calculation error of height angle is less than 0.4″, the calculation error of astronomical coordinate pointed by rotation axis is less than 1″.
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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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