ESA Greenland Ice Sheet Climate Change Initiative (Greenland_Ice_Sheet_cci): Ice Velocity data for the Greenland Margin from the PALSAR instrument for 2006-2011, v1.1 (June 2016 version)

This dataset contains a time series of ice velocities for the Greenland margin from the PALSAR instrument on the ALOS satellite. It has been produced by the ESA Greenland Ice Sheet Climate Change Initiative (CCI) project. This dataset consists of a time series of ice velocity with yearly sampling, derived from intensity tracking of PALSAR data acquired between 20-12-2016 and 17-03-2011. It provides components of the ice velocity and the magnitude of the velocity. The data are provided on a polar stereographic grid (EPSG3413: Latitude of true scale 70N, Reference Longitude 45E). The horizontal velocity is provided in true meters per day, towards the EASTING(x) and NORTHING(y) directions of the grid; the vertical displacement (z), derived from a digital elevation model, is also provided. Please note that the previous versions of this product provided the horizontal velocities as true East and North velocities.Both a single NetCDF file (including all measurements and annotation), and separate geotiff files with the velocity components are provided. The product was generated by GEUS. For further details, please consult the Product User Guide (v2.0)Please note - this product was released on the Greenland Ice Sheets download page in June 2016, but an earlier product (also accidentally labelled v1.1) was available through the CCI Open Data Portal and the CEDA archive until 29th November 2016. Please now use the later v1.1 product.

本数据集收录了来自 ALOS 卫星 PALSAR 仪器采集的格陵兰边缘冰流速的时间序列数据。该数据集由欧洲空间局（ESA）格陵兰冰盖气候变化倡议（CCI）项目制作。数据集包含从 2016 年 12 月 20 日至 2011 年 3 月 17 日获取的 PALSAR 数据的冰流速时间序列，以年为单位进行采样。数据提供了冰流速的分量及其大小。数据以极地投影网格（EPSG3413：真实比例纬度为 70N，参考经度为 45E）提供。水平速度以真实米/日为单位，沿网格的东向（x）和北向（y）方向提供；垂直位移（z），由数字高程模型导出，亦予以提供。请注意，此产品的前版本提供了作为真实东向和北向速度的水平速度。产品包括包含所有测量和注释的单个 NetCDF 文件，以及提供速度分量的单独 GeoTIFF 文件。该产品由地质调查局（GEUS）生成。如需进一步详细信息，请参阅产品用户指南（v2.0）。请注意——此产品于 2016 年 6 月发布于格陵兰冰盖下载页面，但一个较早的产品（亦意外标记为 v1.1）可通过 CCI 开放数据门户和 CEDA 档案直至 2016 年 11 月 29 日获取。现请使用较新的 v1.1 产品。