Add CYGNSS soil moisture observation reader (#76)

Author: gmao-rreichle

CHANGELOG.md

@@ -12,7 +12,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - New update_type for joint 3d soil moisture and 1d snow analysis (Tb+sfmc+sfds+SCF obs).
-- Use M21C surface met forcing.
+- Added CYGNSS soil moisture reader.
+- Added M21C surface met forcing.
 
 ### Changed
 

GEOSlandassim_GridComp/clsm_ensupd_glob_param.F90

@@ -48,7 +48,7 @@ module clsm_ensupd_glob_param
   ! total number of all obs species defined in "ensupd" namelist file
   ! (regardless of whether "assim" flag is true or false)
 
-  integer, parameter :: N_obs_species_nml = 53
+  integer, parameter :: N_obs_species_nml = 55
 
   ! ----------------------------------------------------------------------
   !