oaioai:figshare.com:article/6892565

Satellite Laser Ranging in 5x5 Spherical Harmonics

Abstract

<p>This is a variant of the weekly, 5x5 SLR product created at the University of Texas’s Center for Space Research (CSR) which is released alongside the GRACE series:</p> <p>ftp://podaac.jpl.nasa.gov/allData/tellus/preview/L2/deg_5/CSR.Weekly.5x5.Gravity_Harmonics.txt. </p> <p>The version here is averaged monthly, rather than weekly, to make it more directly comparable to the monthly GRACE data.  It contains an estimate of C<sub>61</sub>/S<sub>61</sub> (but no other degree-6 harmonics) to avoid skewing the C<sub>­21</sub> harmonic due to a lack of sufficient degrees of freedom during the creation of the SLR gravity product (Cheng and Ries, 2017).  From January - November 1993, only four satellites were used in its creation (Starlette, Ajisai, and Lageos 1 and 2).  After that point, Stella was added as well.  Data exists through mid-2017.<br> <br> The layout of the files contains a header section followed by one line containing the date for the following lines, and then 22 lines of spherical harmonic data.  The time lines are formatted as:  IARC, MAXDEG, NP, IYEAR, IM, XMJD:<br>        IARC: the arc number (ie: month number) <br>        MAXDEG: spherical harmonic maximum degree/order of the field   <br>        NP:  number of coefficient pairs (Cnm & Snm)<br>        IYEAR:  year<br>        IM:  month<br>        XMJD: epoch of the arc at the first day in modified Julian date</p> <p>The data lines are formatted as:  N, M, Cnm, Snm, Cnm-sigma, Snm-sigma:<br>       N:  spherical harmonic degree <br>       M:  spherical harmonic order<br>       Cnm:  C coefficient <br>       Snm:  S coefficient<br>       Cnm-sig:  The formal errors of the C coefficient<br>       Snm-sig:  The formal errors of the S coefficient<br>  </p

Similar works

Full text

thumbnail-image
oaioai:figshare.com:article/6892565Last time updated on 8/13/2018

This paper was published in FigShare.

Having an issue?

Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.