diff --git a/rectify.py b/rectify.py
index c20ba43..5239c92 100755
--- a/rectify.py
+++ b/rectify.py
@@ -8,7 +8,7 @@ from math import atan,sin,cos,sqrt,tan,acos,ceil
 from PIL import Image
 
 EARTH_RADIUS = 6371.0
-SAT_HEIGHT = 822.5
+SAT_HEIGHT = 830.0
 SAT_ORBIT_RADIUS = EARTH_RADIUS + SAT_HEIGHT
 SWATH_KM = 2800.0
 THETA_C = SWATH_KM / EARTH_RADIUS
@@ -180,4 +180,4 @@ if __name__ == "__main__":
     # It's a dead pool now
     p.join()
 
-    rectified_img.save(out_fname + ".jpg", "JPEG", quality=90)
+    rectified_img.save(out_fname + ".png", "PNG")