Jason-2 Global Statistical Assessment and Cross-Calibration with Jason-1
Jason-2 Global Statistical Assessment and Cross-Calibration with Jason-1
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DOI：
10.1080/01490419.2010.487805
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发表时间：
2010-01-01
期刊：
影响因子：
1.6
通讯作者：
Bronner, E.
中科院分区：
文献类型：
--
作者：
Ablain, M.;Philipps, S.;Bronner, E.
OSTM/Jason-2（海洋表面地形任务，本文称为Jason-2）卫星于2008年6月20日成功发射，并于2008年7月4日进入其名义轨道。截至2009年1月26日，Jason-2与Jason-1编队飞行，间隔仅55秒，随后Jason-1被移至新的交错轨道。本文的目标是使用地球物理数据记录 (GDR) 产品评估 Jason-2 数据质量并从任务一开始就估计测高系统性能。我们的研究将集中于 Jason-1/Jason-2 交叉校准，利用在编队飞行阶段任务在同一地面轨道上相隔 55 秒的机会。这使我们能够精确评估两个任务之间的参数差异和海面高度 (SSH) 一致性，以便检测地理相关的偏差、跳跃或漂移。本文的结果表明，Jason-2任务满足高精度测高的要求，这对未来的海洋学研究和应用至关重要。特别是，它允许以与 Jason-1 和 TOPEX/Poseidon 相同（或更好）的精度继续观测平均海平面 (MSL) 变化，这是 Jason-2 任务的挑战之一。还确定了潜在的改进和未解决的问题，目标是在测高数据质量方面继续取得进展。
OSTM/Jason-2 (Ocean Surface Topography mission, named Jason-2 in this paper) satellite was successfully launched on June 20, 2008, and was put on its nominal orbit on July 4, 2008. Up to January 26, 2009, Jason-2 was flying in formation with Jason-1 only 55 seconds apart before Jason-1 was moved to its new interleaved orbit. The objectives of this paper are to assess Jason-2 data quality and to estimate the altimetry system performance fromthe beginning of themission, using Geophysical Data Records (GDRs) products. Our study will focus on Jason-1/Jason-2 cross-calibration using the opportunity that the missions were on the same ground track separated by 55 seconds during the formation flight phase. This allows us to precisely assess parameter discrepancies and Sea Surface Height (SSH) consistency between both missions in order to detect geographically correlated biases, jumps or drifts. From the results presented in this paper, it is demonstrated that the Jason-2 mission fulfils the requirements of high precision altimetry, which is crucial for future oceanographic studies and applications. In particular, it allows continuation of the observation of the Mean Sea Level (MSL) variations at the same (or better) accuracy as Jason-1 and TOPEX/Poseidon, which was one of the challenges of the Jason-2 mission. Potential improvements and open issues are also identified, with the objective of still making progress in terms of altimetry data quality.