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Jason-1/Jason-2 Metocean Comparisons and Monitoring

机译：Jason-1 / Jason-2线虫的比较和监测

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The initial tandem phase of the Jason-2 mission is important for the calibration of the entire altimetric system, not just the records of sea surface height. As well as allowing a bulk comparison of metocean parameters such as wave height and backscatter strength (used to infer wind speed), the tandem phase also affords a more detailed opportunity to understand the artefacts within each instrument. The wave height comparison shows no bias between the instruments, with the mismatch error of consecutive points independent of one another. The backscatter difference is not a simple offset but also has a trend with weak nonlinear variations. The technique for backscatter monitoring using K_u-/C-band differences is validated during the tandem phase, and extended to show ～59-dav oscillations throughout the Jason-1 mission. This effect, which is predominantly in the C-band, is related to changing solar exposure due to the fraction of orbit in eclipse varying as the orbit precesses. Such anomalies were partially present in TOPEX-B data but are not noticeable for Jason-2. It is recommended that all TOP EX, Jason-1, and Jason-2 data be transformed to a consistent scale, allowing for the bias and trend terms in the offsets between instruments, and correcting for any long-period drifts in individual calibration; this will enable a single wind speed algorithm to be applied to the combined satellite data.
机译：Jason-2任务的初始串联阶段对于整个高度系统的校准非常重要，而不仅仅是海面高度的记录。串联阶段不仅可以对海浪参数（如海浪高度和后向散射强度（用于推断风速）进行大量比较），还提供了更详细的机会来了解每种仪器中的伪像。波高比较显示仪器之间没有偏差，连续点的失配误差彼此独立。反向散射差异不是简单的偏移，而是具有非线性变化较弱的趋势。在串联阶段验证了使用K_u- / C波段差异进行反向散射监测的技术，并扩展到在整个Jason-1任务中显示〜59 dav振荡。这种影响主要发生在C波段，与日照的变化有关，这是由于日食中的轨道部分随轨道进动而变化的。这种异常部分存在于TOPEX-B数据中，但对于Jason-2而言并不明显。建议将所有TOP EX，Jason-1和Jason-2数据转换为一致的标度，考虑仪器之间的偏差中的偏差和趋势项，并校正各个校准中的任何长时间漂移；这将使单个风速算法可以应用于组合的卫星数据。

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