CERES Bidirectional Scans Terra FM2 Edition1-CV

CER_BDS_Terra-FM2_Edition1-CV is the Clouds and the Earth's Radiant Energy System (CERES) Bidirectional Scans (BDS) Terra Flight Model 2 (FM2) Edition1-CV data product, which was collected using the CERES-FM2 instrument on the Terra platform. This data product is intended only to be used for instrument validation purposes and is, therefore, not suited for science publications. Data collection for this product is ongoing.

Note: Edition 1-CV data are only for instrument validation and not suited for science publications.

Each CERES BDS data product contains twenty-four hours of Level-1B data for each CERES scanner instrument mounted on each spacecraft. BDS includes samples of normal and short Earth scan elevation profiles in fixed and rotating azimuth modes (including space, internal calibration, and solar calibration views). BDS contains Level-0 raw (unconverted) and the geolocated converted science and instrument data. BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. CERES is a key Earth Observing System (EOS) program component.

CERES is a key Earth Observing System (EOS) program component. The CERES instruments provide radiometric measurements of the Earth's atmosphere from three broadband channels. The CERES missions follow the successful Earth Radiation Budget Experiment (ERBE) mission. The first CERES instrument, the proto flight model (PFM), was launched on November 27, 1997, as part of the Tropical Rainfall Measuring Mission (TRMM). Two CERES instruments (FM1 and FM2) were launched into polar orbit on board the Earth Observing System (EOS) flagship Terra on December 18, 1999. Two additional CERES instruments (FM3 and FM4) were launched on board Earth Observing System (EOS) Aqua on May 4, 2002. The CERES FM5 instrument was launched on board the Suomi National Polar-orbiting Partnership (NPP) satellite on October 28, 2011. The newest CERES instrument (FM6) was launched on board the Joint Polar-Orbiting Satellite System 1 (JPSS-1) satellite, now called NOAA-20, on November 18, 2017.

CER_BDS_Terra-FM2_Edition1-CV 是云与地球辐射能量系统（Clouds and the Earth's Radiant Energy System, CERES）双向扫描（Bidirectional Scans, BDS）Terra飞行模型2（Flight Model 2, FM2）Edition1-CV数据产品，由搭载于Terra平台的CERES-FM2仪器采集。本数据产品仅用于仪器验证，因此不适用于科学出版物。该产品的数据采集工作仍在持续中。

注：Edition 1-CV数据仅可用于仪器验证，不适用于科学出版物。

每一款CERES BDS数据产品均包含搭载于各航天器的每台CERES扫描器仪器的24小时1B级数据。BDS涵盖固定方位角模式与旋转方位角模式下的正常地球扫描和短距地球扫描高程剖面样本（包含太空视图、内部校准视图与太阳校准视图）。BDS包含0级原始（未转换）数据以及经过地理定位转换的科学与仪器数据。此外，BDS还包含0级输入文件中未涵盖的额外数据，包括转换后的卫星位置与速度数据、天体数据、转换后的数字状态数据，以及辐射亮度计数转换方程中使用的参数。CERES是地球观测系统（Earth Observing System, EOS）计划的核心组成部分。

CERES是地球观测系统（Earth Observing System, EOS）计划的核心组成部分。CERES仪器可通过三个宽带通道对地球大气层进行辐射测量。CERES任务接续此前成功实施的地球辐射收支实验（Earth Radiation Budget Experiment, ERBE）任务。首台CERES仪器即原型飞行模型（Proto Flight Model, PFM）于1997年11月27日作为热带降雨测量任务（Tropical Rainfall Measuring Mission, TRMM）的一部分发射升空。两台CERES仪器（FM1与FM2）于1999年12月18日搭载于地球观测系统旗舰任务Terra卫星进入极地轨道。另外两台CERES仪器（FM3与FM4）于2002年5月4日搭载于地球观测系统Aqua卫星发射升空。CERES FM5仪器于2011年10月28日搭载于Suomi国家极地轨道伙伴关系（Suomi National Polar-orbiting Partnership, NPP）卫星发射升空。最新的CERES仪器（FM6）于2017年11月18日搭载于联合极地轨道卫星系统1号（Joint Polar-Orbiting Satellite System 1, JPSS-1，现更名为NOAA-20）卫星发射升空。