From 7b3ca67a85a3befee916e9c96fd606d0dad47787 Mon Sep 17 00:00:00 2001
From: zachghiaccio <48361714+zachghiaccio@users.noreply.github.com>
Date: Sat, 9 Jan 2021 14:22:40 -0500
Subject: [PATCH] Update README.md

Added a brief summary of is2_robust_spread.m
---
 README.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 52fcf91..d77a3c8 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,9 @@ is2_sfc_detect_sub.m - Uses the chunked data to find lake surfaces. An initial g
 
 is2_sfc_find.m - Gives a second guess for the location of a lake surface. Currently has issues with smaller lakes seen on Greenland.
 
-is2_ph_dist.m - Uses photon refinement procedures (see Smith et al., 2019 for more details) to improve lake bed estimation. 
+is2_ph_dist.m - Uses photon refinement procedures (see Smith et al., 2019 for more details) to improve lake bed estimation.
+
+is2_robust_spread.m - Determines the statistical distribution to ATL03 high confidence photons. Equivalent to the standard deviation if the photon distribution is a near-Gaussian.
 
 is2_polyfit_sub.m - Adds a 3rd-order polynomial curve to lake beds, to fill the gaps in attenuated regions. A separate subroutine was needed to account for multiple lakes in a scene.