GHRSST Level 2P North Atlantic Regional Bulk Sea Surface Temperature from the Advanced Very High Resolution Radiometer (AVHRR) on the NOAA-17 satellite produced by NEODAAS (GDS version 1)

A Level 2P swath-based Group for High Resolution Sea Surface Temperature (GHRSST) dataset for the North Atlantic area from the Advanced Very High Resolution Radiometer (AVHRR) on the NOAA-17 platform (launched on 24 June 2002). This particular dataset is produced by the Natural Environment Research Council (NERC) Earth Observation Data Acquisition and Analysis Service (NEODAAS) in collaboration with the National Centre for Ocean Forecasting (NCOF) in the United Kingdom. The AVHRR is a space-borne scanning sensor on the National Oceanic and Atmospheric Administration (NOAA) family of Polar Orbiting Environmental Satellites (POES) having a operational legacy that traces back to the Television Infrared Observation Satellite-N (TIROS-N) launched in 1978. AVHRR instruments measure the radiance of the Earth in 5 (or 6) relatively wide spectral bands. The first two are centered around the red (0.6 micrometer) and near-infrared (0.9 micrometer) regions, the third one is located around 3.5 micrometer, and the last two sample the emitted thermal radiation, around 11 and 12 micrometers, respectively. The legacy 5 band instrument is known as AVHRR/2 while the more recent version, the AVHRR/3 (first carried on the NOAA-15 platform), acquires data in a 6th channel located at 1.6 micrometer. Typically the 11 and 12 micron channels are used to derive sea surface temperature (SST) sometimes in combination with the 3.5 micron channel. The highest ground resolution that can be obtained from the current AVHRR instruments is 1.1 km at nadir. The NOAA platforms are sun synchronous generally viewing the same earth location twice a day or more (latitude dependent) due to the relatively large AVHRR swath of approximately 2400 km.

NEODAAS-Dundee acquires approximately 15 AVHRR direct broadcast High Resolution Picture Transmission (HRPT) passes per day over NW Europe and the Arctic. Each pass is approximately 15 minutes duration. These are immediately transferred to NEODAAS-Plymouth where they are processed into sea surface temperature (SST) products and converted to L2P specifications.

本数据集为搭载于NOAA-17平台（2002年6月24日发射）上的先进甚高分辨率辐射计（Advanced Very High Resolution Radiometer, AVHRR）获取的北大西洋区域L2P级条带式高分辨率海表温度（Group for High Resolution Sea Surface Temperature, GHRSST）数据集。该数据集由英国自然环境研究理事会（Natural Environment Research Council, NERC）的地球观测数据获取与分析服务中心（NEODAAS）联合英国国家海洋预报中心（National Centre for Ocean Forecasting, NCOF）共同制作。
先进甚高分辨率辐射计是美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）极轨环境卫星（Polar Orbiting Environmental Satellites, POES）系列搭载的星载扫描传感器，其运行历史可追溯至1978年发射的电视红外观测卫星-N（Television Infrared Observation Satellite-N, TIROS-N）。AVHRR仪器可测量地球在5（或6）个相对较宽光谱波段的辐射亮度：前两个波段中心分别位于红光（0.6微米）和近红外（0.9微米）波段，第三个波段中心约为3.5微米，最后两个波段分别采样11微米和12微米波段的热辐射。传统的5波段仪器被称为AVHRR/2，而最新版本AVHRR/3（首次搭载于NOAA-15平台）新增了1.6微米的第6通道。通常可利用11和12微米波段（有时结合3.5微米波段）反演海表温度（Sea Surface Temperature, SST）。当前AVHRR仪器在星下点可获得的最高地面分辨率为1.1千米。NOAA卫星采用太阳同步轨道，得益于AVHRR约2400公里的扫描刈幅宽度，该卫星通常每天可两次或更多次过境同一地球位置（具体频次随纬度变化）。
NEODAAS-邓迪分校每天约可获取15次覆盖西北欧与北极区域的AVHRR直接广播高分辨率图像传输（High Resolution Picture Transmission, HRPT）过境数据，单次过境时长约15分钟。这些数据会被即时传输至NEODAAS-普利茅斯分校，在该处被处理为海表温度产品并转换为L2P规范格式。