diff --git a/function_gfr/hmat.m b/function_gfr/hmat.m
index bb1cdffebbba28b34903155a2412354313148a93..942ba688b3e33522e53ee5f232a1587ed9e4dc84 100644
--- a/function_gfr/hmat.m
+++ b/function_gfr/hmat.m
@@ -17,7 +17,7 @@ function [Hi_tilda,GiR]= hmat(X0,NOCs)
 %   GiR = [Rho Rhodot]
 % 
 % Main functions
-% - InterSCD: calculates range and range rate from position and velocity of two satellites
+% - inter_sat_dist: calculates range and range rate from position and velocity of two satellites
 % 
 % Written by Neda Darbeheshti, AEI Hannover, 2018-05-25