fix: Use np.isfinite to test for infite ssr threshold

midas/doy_kernels.py

@@ -141,7 +141,7 @@ class DOYSmootingSpline:
                 else:
                     ssr_y_threshold = d[0][d[0] > 0.0].min()
                 ssr_threshold = min(ssr_x_threshold, ssr_y_threshold)
-                if not np.isnan(ssr_threshold):
+                if np.isfinite(ssr_threshold):
                     x_below_threshold = d[1] < ssr_threshold
                     no_x_below_threshold = np.count_nonzero(x_below_threshold)
                     random_fill = rng.uniform(0.0, ssr_threshold, no_x_below_threshold)