Add whatsnew, update tests

Author: AdamRJensen

docs/sphinx/source/whatsnew/v0.15.3.rst

@@ -18,7 +18,11 @@ Bug fixes
 
 Enhancements
 ~~~~~~~~~~~~
-
+* Add iotools functions to retrieve irradiance and weather data from NSRDB PSM4 Polar,
+  which provides satellite-derived irradiance data above 60 degree latitude.
+  :py:func:`~pvlib.iotools.get_nsrdb_psm4_polar` and
+  :py:func:`~pvlib.iotools.get_nsrdb_psm4_polar_tmy`.
+  (:issue:`2639`, :pull:`2807`)
 
 Documentation
 ~~~~~~~~~~~~~
@@ -42,4 +46,5 @@ Maintenance
 
 Contributors
 ~~~~~~~~~~~~
-
+* Adam R. Jensen (:ghuser:`AdamRJensen`)
+* Erin Tonita (:ghuser:`etoni044`)

pvlib/iotools/psm4.py

@@ -644,9 +644,9 @@ def get_nsrdb_psm4_polar(latitude, longitude, api_key, email,
     high latitude regions, that are outside the field of view of the
     geostationary satellites.
 
-    The dataset provides data from 2013 onwards over the exclusive economic zone
-    above 60 degrees north. The data have a spatial resolution of 4 km and a
-    temporal resolution of 1 hour.
+    The dataset provides data from 2013 onwards over the exclusive economic
+    zone above 60 degrees north. The data have a spatial resolution of 4 km
+    and a temporal resolution of 1 hour.
 
     Parameters
     ----------

tests/iotools/test_psm4.py

@@ -87,13 +87,14 @@ def test_get_nsrdb_psm4_polar(nlr_api_key):
     data, metadata = psm4.get_nsrdb_psm4_polar(
         LATITUDE_POLAR, LONGITUDE_POLAR,
         nlr_api_key, PVLIB_EMAIL,
-        year='2023',
+        year=2023,
         leap_day=False,
         parameters=["ghi"],
         utc=True,
         map_variables=False)
-    expected = pd.read_csv(POLAR_TEST_DATA)
-    assert_psm4_equal(data, metadata, expected)
+    expected, _ = psm4.read_nsrdb_polar(POLAR_TEST_DATA)
+    #assert_psm4_equal(data, metadata, expected)
+    pd.testing.assert_frame_equal(data, expected)
 
 
 @pytest.mark.remote_data