NOAA GOES-R Series Advanced Baseline Imager (ABI) Level 2 Cloud Top Height (ACHA)

The Cloud Top Height product contains an image with pixel values identifying the geopotential height at the top of a cloud layer. The product is generated in combination with the Cloud Top Temperature and Cloud Top Pressure products by the same algorithm. The product includes data quality information that provides an assessment of the cloud top height data values for on-earth pixels. The units of measure for the cloud top height value is meters. The Cloud Top Pressure product image is produced on the Advanced Baseline Imager (ABI) fixed grid (at 10 km for Full Disk and CONUS coverage regions and at 4km for Mesoscale) under the following conditions: Cloudy; Geolocated source data to local zenith angles of 70 degrees for both daytime and nighttime conditions. The product's spatial resolution increased from 10 and 4 km to 2 km on 24 March 2023.

云顶高度产品包含一幅图像，其像素值用于标识云层顶部的位势高度（geopotential height）。该产品由同一算法联合云顶温度（Cloud Top Temperature）与云顶气压（Cloud Top Pressure）两款产品共同生成。该产品包含数据质量信息，可对地球像素对应的云顶高度数据值开展质量评估。云顶高度值的计量单位为米。云顶气压产品图像基于先进基线成像仪（Advanced Baseline Imager, ABI）固定网格生成，其中全圆盘及美国本土覆盖区域分辨率为10公里，中尺度区域分辨率为4公里，生成条件如下：图像覆盖云区；源数据经地理定位后，无论日间还是夜间，当地天顶角均不超过70度。该产品的空间分辨率于2023年3月24日从10公里与4公里提升至2公里。