Merge pull request #5 from NREL/disc_sza_fix

fix sza_lim

Author: MRossol

.github/workflows/pull_request_tests.yml

@@ -14,8 +14,6 @@ jobs:
             python-version: 3.8
           - os: ubuntu-latest
             python-version: 3.7
-          - os: ubuntu-latest
-            python-version: 3.6
 
     steps:
     - uses: actions/checkout@v2

farms/disc.py

@@ -13,10 +13,10 @@
 """
 import numpy as np
 
-from farms import SOLAR_CONSTANT, SZA_LIM
+from farms import SOLAR_CONSTANT
 
 
-def disc(ghi, sza, doy, pressure=101325, sza_lim=SZA_LIM):
+def disc(ghi, sza, doy, pressure=101325, sza_lim=87):
     """Estimate DNI from GHI using the DISC model.
 
     *Warning: should only be used for cloudy FARMS data.
@@ -37,7 +37,8 @@ def disc(ghi, sza, doy, pressure=101325, sza_lim=SZA_LIM):
         Pressure in Pascals.
     sza_lim : float | int
         Upper limit for solar zenith angle in degrees. SZA values greater than
-        this will be truncated at this value.
+        this will be truncated at this value. 87 deg chosen to simulate the
+        FORTRAN code in use by SRRL (from Perez).
 
     Returns
     -------

farms/version.py

@@ -2,4 +2,4 @@
 FARMS version number
 """
 
-__version__ = "1.0.1"
+__version__ = "1.0.2"