GRACE CSR机构DDK1-DDK8数据读取逐月展示程序

TITLE: Monthly estimates of degree 1 gravity coefficients UPDATE HISTORY: Updated 16 Jul 2015 - last month reported is Apr 2015 Based on CSR Release-05 coefficients (Fixes an error in code; see Note 4). AUTHOR: Don Chambers, College of Marine Science, The University of South Florida (donc@usf.edu) DESCRIPTION: We have determined an estimate of degree 1 gravity coefficients based on ocean and atmospheric models and GRACE coefficients for degrees 2 and higher [Swenson et al., 2008]. Data from the new Release-05 data have been used. The coefficients in this file represent the land component of the degree 1 gravity coefficients, normalized using the GRACE standards. To use for land applications, use these coefficients along with GRACE GSM coefficients for degrees 2 and higher, along with a Degree 1 Love number (k1) = 0.021. For ocean applications, add the degree 1 values found in the ocean bottom pressure product (GAD) to these values. If you are interested in adding the full ocean, land, atmosphere coefficients, add the degree 1 values of the atmosphere/ocean product (GAC) to these values. Data format is similar to that for GSM, GAD, and GAC files distributed by PODAAC, where the last two columns reflect the start and end times for the GSM file in the format of <year><month><day>. REFERENCE: Swenson, S., D. Chambers, and J. Wahr 2008 Estimating geocenter variations from a combination of GRACE and ocean model output, J. Geophys. Res., 113, B08410, doi:10.1029/2007JB005338. SPECIAL NOTES: 1) Although a solution exists for 200401, it is based on less than 15 days of data and is not considered useful 2) No solutions exist for 201101, 201106, 201205, or 201110 because of the lack of useful accelerometer data 3) Starting in late 2011, many 30-day solutions span multiple months, which is reflected in the start and end times in this file. This is due to efforts to control battery lifetime and extend the mission, which requires turning off the accelerometer and other instruments for extended periods of time. This will likely continue until the end of the mission. 4) A small bug was discovered in the code. All coefficients have changed since the update of 15 October 2013. Thanks to Jade Sun and Ricardo Riva for discovering this. The change is small, mainly in C11. The effect on mapped OBP grids is less than 5 mm in equivalent water thickness, and in mean ocean mass about 1 mm standard deviation, mainly in the seasonal peaks. 5) There was an error discovered in the AOD1B files for June 2013-2014. This has been corrected and degree 1 terms for those months recomputed based on corrected GSM coefficients. Please update your data to these new coefficients. It only affects results from June 2013 to June 2014. 6) January 2015 solution based on only 18-days of GRACE data. February and March 2015 solutions based on a special 60x30 solution due to GRACE being in a 2-day repeat orbit during these months. '(a6,2i5,2E19.12,2E11.4,2f14.4)' 200208 1 0-0.144353206736E-09 0.000000000000E+00 0.3621E-10 0.3621E-10 20020801.0000 20020901.0000 200208 1 1-0.107726019396E-09 0.139180321101E-10 0.3621E-10 0.3621E-10 20020801.0000 20020901.0000 200209 1 0-0.214456574008E-09 0.000000000000E+00 0.3621E-10 0.3621E-10 20020901.0000 20021001.0000 200209 1 1-0.687776858204E-10 0.152036398799E-09 0.3621E-10 0.3621E-10 20020901.0000 20021001.0000 200210 1 0-0.131852270983E-09 0.000000000000E+00 0.3621E-10 0.3621E-10 20021001.0000 20021101.0000 200210 1 1-0.108850068347E-09 0.170064826725E-09 0.3621E-10 0.3621E-10 20021001.0000 20021101.0000 200211 1 0-0.675180945816E-10 0.000000000000E+00 0.3621E-10 0.3621E-10 20021101.0000 20021201.0000 200211 1 1-0.858896584779E-11 0.116388459322E-09 0.3621E-10 0.3621E-10 20021101.0000 20021201.0000 200212 1 0-0.293745791128E-10 0.000000000000E+00 0.3621E-10 0.3621E-10 20021201.0000 20030101.0000 200212 1 1-0.285287194565E-10-0.127287107290E-10 0.3621E-10 0.3621E-10 20021201.0000 20030101.0000 200301 1 0 0.193826200240E-10 0.000000000000E+00 0.3621E-10 0.3621E-10 20030101.0000 20030201.0000 200301 1 1 0.903683740539E-10 0.679096697975E-10 0.3621E-10 0.3621E-10 20030101.0000 20030201.0000 200302 1 0 0.435947474360E-10 0.000000000000E+00 0.3621E-10 0.3621E-10 20030201.0000 20030301.0000 200302 1 1 0.173000142950E-10 0.585932011962E-10 0.3621E-10 0.3621E-10 20030201.0000 20030301.0000 200303 1 0 0.852567178748E-10 0.000000000000E+00 0.3621E-10 0.3621E-10 20030301.0000 20030401.0000 200303 1 1 0.121607708897E-09-0.953897573577E-10 0.3621E-10 0.3621E-10 20030301.0000 20030401.0000 200304 1 0 0.985131819870E-10 0.000000000000E+00 0.3621E-10 0.3621E-10 20030401.0000 20030501.0000 200304 1 1 0.675341642011E-10-0.374231199603E-10 0.3621E-10 0.3621E-10 20030401.0000 20030501.0000 200305 1 0 0.133404807184E-09 0.000000000000E+00 0.3621E-10 0.3621E-10 20030501.0000 20030522.0000 200305 1 1 0.767315616771E-10-0.648591583586E-10 0.3621E-10 0.3621E-10 20030501.0000 20030522.0000 200307 1 0-0.765677982942E-10 0.000000000000E+00 0.3621E-10 0.3621E-10 20030701.0000 20030801.0000 200307 1 1-0.356312967461E-10 0.264616322631E-11 0.3621E-10 0.3621E-10 20030701.0000 20030801.0000 200308 1 0-0.215942809791E-09 0.000000000000E+00 0.3621E-10 0.3621E-10 20030801.0000 20030901.0000 200308 1 1-0.154281167095E-10 0.977925465892E-10 0.3621E-10 0.3621E-10 20030801.0000 20030901.0000 200309 1 0-0.131224193794E-09 0.000000000000E+00 0.3621E-10 0.3621E-10 20030901.0000 20031001.0000 200309 1 1-0.824334338967E-10 0.241729421573E-09 0.3621E-10 0.3621E-10 20030901.0000 20031001.0000 200310 1 0-0.172511125558E-09 0.000000000000E+00 0.3621E-10 0.3621E-10 20031001.0000 20031101.0000 200310 1 1-0.111970438778E-09 0.125451247651E-09 0.3621E-10 0.3621E-10 20031001.0000 20031101.0000 200311 1 0-0.107823305052E-09 0.000000000000E+00 0.3621E-10 0.3621E-10 20031101.0000 20031201.0000 200311 1 1-0.655280666667E-10 0.941606783977E-10 0.3621E-10 0.3621E-10 20031101.0000 20031201.0000 200312 1 0-0.294091660641E-10 0.000000000000E+00 0.3621E-10 0.3621E-10 20031201.0000 20040101.0000 200312 1 1-0.556427884451E-10 0.798465481804E-10 0.3621E-10 0.3621E-10 20031201.0000 20040101.0000 200401 1 0 0.416400000000E-10 0.000000000000E+00 0.3621E-10 0.3621E-10 20040204.0000 20040301.0000 200401 1 1 -0.13109000000E-11 0.335000000000E-10 0.3621E-10 0.3621E-10 20040204.0000 20040301.0000 200402 1 0 0.184784207180E-09 0.000000000000E+00 0.3621E-10 0.3621E-10 20040204.0000 20040301.0000 200402 1 1 0.657661116368E-10 0.444378905043E-10 0.3621E-10 0.3621E-10 20040204.0000 20040301.0000 200403 1 0 0.114154862164E-09 0.000000000000E+00 0.3621E-10 0.3621E-10 20040301.0000 20040401.0000 200403 1 1 0.502315781091E-10-0.441643108248E-10 0.3621E-10 0.3621E-10 20040301.0000 20040401.0000 200404 1 0 0.221777547400E-09 0.000000000000E+00 0.3621E-10 0.3621E-10 20040401.0000 20040501.0000 200404 1 1 0.162362943152E-09-0.523151185829E-10 0.3621E-10 0.3621E-10 20040401.0000 20040501.0000 200405 1 0 0.130217122949E-09 0.000000000000E+00 0.3621E-10 0.3621E-10 20040501.0000 20040601.0000 200405 1 1 0.694387337925E-10-0.522172453413E-10 0.3621E-10 0.3621E-10 20040501.0000 20040601.0000 200406 1 0 0.387724436648E-10 0.000000000000E+00 0.3621E-10 0.3621E-10 20040601.0000 20040701.0000 200406 1 1 0.177308199913E-10-0.804211486442E-10 0.3621E-10 0.3621E-10 20040601.0000 20040701.0000 200407 1 0-0.246341604201E-11 0.000000000000E+00 0.3621E-10 0.3621E-10 20040701.0000 20040801.0000 200407 1 1 0.58786602