Update README.md

README.md

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 There are three main files:
 1.  runET_GP_CC.m   This code analyzes the continuous core data from either Northern North Carolina ('NNC_CC.csv') or New Jersey (NJ_CC.csv') with the Empirical Temporal Gaussian Process model described in sections 3.2.3, 4.3, and 5.1.
 2.  runESTGP_AtlUS.m  This code analyzes proxy data from the Atlantic Coast of the U.S. in the file 'US_Atlantic_Coast_for_ESTGP.csv' with the Empirical Spatio-Temporal Gaussian Process model described in sectiona 3.3.1, 4.3, and 5.2.
-3.  runESTGP_TG.m   This code analyses tide gauges along the Atlantic Coast of the U.S., downloaded from https://www.psmsl.org/data/.
+3.  runESTGP_TG.m   This code analyses tide gauges along the Atlantic Coast of the U.S.  These tide guages must be downloaded from https://www.psmsl.org/data/obtaining/complete.php.  In this analysis we used annual RSL averages.  Unzip the rlr_annual file in the IFILES directory to run this code on it.
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 After running the chosen model, the results can be found within a folder where you are running (or have specified within) the code.
 
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 All other dependencies can be found in MFILES, and all data files needed to run this code are found in IFILES.