Fix incorrect ghi_clear PSM3 request mapping (#1819)

* fix psm3 request mapping

* whatsnew

Author: kandersolar

docs/sphinx/source/whatsnew/v0.10.2.rst

@@ -19,7 +19,8 @@ Enhancements
 
 Bug fixes
 ~~~~~~~~~
-
+* :py:func:`~pvlib.iotools.get_psm3` no longer incorrectly returns clear-sky
+  DHI instead of clear-sky GHI when requesting ``ghi_clear``. (:pull:`1819`)
 
 Testing
 ~~~~~~~

pvlib/iotools/psm3.py

@@ -46,7 +46,7 @@
     'ghi': 'ghi',
     'dhi': 'dhi',
     'dni': 'dni',
-    'ghi_clear': 'clearsky_dhi',
+    'ghi_clear': 'clearsky_ghi',
     'dhi_clear': 'clearsky_dhi',
     'dni_clear': 'clearsky_dni',
     'zenith': 'solar_zenith_angle',