TROPICS01 Pathfinder L1A Orbital Geolocated Native-Resolution Antenna Temperatures V1.0

The "Time-Resolved Observations of Precipitation structure and storm Intensity with a Constellation of Smallsats" (TROPICS) mission has a goal of providing nearly all-weather observations of three-dimensional temperature and humidity, as well as cloud ice and precipitation horizontal structure, at high temporal resolution to conduct high-value science investigations of tropical cyclones. The mission comprises a constellation of six identical Space Vehicles (SVs) conforming to the 3U form factor and hosting a passive microwave spectrometer payload. This dataset is produced from the Pathfinder satellite, a single 3U small satellite, which has launched previous to the constellation, on a sun-synchronous orbital plane.

Each SV hosts an identical high-performance spectrometer named the TROPICS Millimeter-wave Sounder (TMS) that will provide temperature profiles using seven channels near the 118.75-GHz oxygen absorption line, water vapor profiles using three channels near the 183-GHz water vapor absorption line, imagery in a single channel near 90 GHz for precipitation measurements (when combined with higher resolution water vapor channels), and a single channel near 205 GHz that is more sensitive to cloud-sized ice particles.

Each TROPICS netCDF file contains a granule of data with 81 spots and approximately 2880 scans, where a granule is defined as an orbit's worth of data.

“利用小型卫星星座对降水结构及风暴强度进行时间分辨观测”（TROPICS）任务旨在提供几乎全天候的三维温度和湿度、云冰和降水水平结构的观测数据，以高时间分辨率开展对热带气旋的高价值科学探究。该任务由六个符合3U形态因子的相同空间飞行器（SVs）星座组成，搭载被动微波光谱仪有效载荷。本数据集由先导卫星——一个单独的3U小型卫星，在星座发射前发射至太阳同步轨道平面——生成。每个SV搭载一个名为TROPICS 毫米波辐射计（TMS）的高性能光谱仪，该光谱仪将利用位于118.75-GHz氧吸收线附近的七个信道提供温度剖面，利用位于183-GHz水汽吸收线附近的三个信道提供水汽剖面，在90 GHz附近的单个信道提供用于降水测量的图像（与更高分辨率的湿度信道结合使用），以及一个位于205 GHz附近、对云粒大小冰粒子更为敏感的单个信道。每个TROPICS netCDF文件包含一个包含81个点和约2880次扫描的数据粒度，其中数据粒度被定义为一次轨道的数据。”}