GFZ TerraSAR-X Rapid Science Orbits (version 2)

This dataset provides Rapid Science Orbits (RSO) from the Low Earth Orbiter (LEO) satellite TerraSAR-X. It is part of the compilation of GFZ RSO products for various LEO missions and the appropriate GNSS constellation in sp3 format. The individual solutions for each satellite mission are published with individual DOI as part of the compilation (Schreiner et al., 2022). • The TerraSAR-X RSO cover the period - from 2007 264 to up-to-date The LEO RSOs in version 2 are generated based on the 30-hour GPS RSOs in two pieces for the actual day with arc lengths of 14 hours and overlaps of 2 hours. One starting at 22:00 and ending at 12:00, one starting at 10:00 and ending at 24:00. Due to the extended length of the constellation, there is no need to concatenate several constellations for day-overlapping arcs. The accuracy of the LEO RSOs is at the level of 1-2 cm in terms of SLR validation. Each solution in version 2 is given in the Conventional Terrestrial Reference System (CTS) based on the IERS 2010 conventions and related to the ITRF-2014 reference frame. The exact time covered by an arc is defined in the header of the files and indicated as well as in the filename.

本数据集提供近地轨道（Low Earth Orbiter, LEO）卫星TerraSAR-X的快速科学轨道（Rapid Science Orbits, RSO）。它属于GFZ（GeoForschungsZentrum，德国地学研究中心）针对各类近地轨道任务及对应全球导航卫星系统（GNSS）星座编制的sp3格式RSO产品合集的组成部分。各卫星任务的独立解算成果均以独立数字对象标识符（Digital Object Identifier, DOI）发布，作为该数据集汇编内容的一部分（Schreiner等，2022）。
• TerraSAR-X的快速科学轨道覆盖时段为2007年第264天至今。版本2的近地轨道快速科学轨道基于当日两段各30小时的GPS快速科学轨道生成，两段弧段时长均为14小时，重叠时长2小时：一段始于22:00、止于次日12:00，另一段始于10:00、止于当日24:00。由于GPS快速科学轨道的弧段时长充足，无需拼接多段星座弧段以实现单日重叠覆盖。经卫星激光测距（Satellite Laser Ranging, SLR）验证，该版本近地轨道快速科学轨道的精度可达1~2厘米。版本2的各独立解算成果均采用基于国际地球自转与参考系统服务（International Earth Rotation and Reference Systems Service, IERS）2010年规程的常规地面参考系统（Conventional Terrestrial Reference System, CTS），并关联至国际参考框架2014（International Terrestrial Reference Frame 2014, ITRF-2014）。单段弧段的精确覆盖时段在文件头中定义，同时也会在文件名中予以标注。

搜集汇总

背景与挑战

背景概述

该数据集提供TerraSAR-X卫星的快速科学轨道数据（版本2），覆盖时间从2007年第264天至今。其轨道生成基于30小时GPS快速科学轨道分成两段，每段弧长14小时并有2小时重叠，精度在SLR验证下达到1-2厘米，使用基于IERS 2010惯例的CTS系统和ITRF-2014参考框架。