Fix WCS delta sign

2 files changed, 4 insertions, 4 deletions

diff --git a/astro/fits/rescale_image.py b/astro/fits/rescale_image.py
index 47db31f..9008b33 100755
--- a/astro/fits/rescale_image.py
+++ b/astro/fits/rescale_image.py
@@ -89,7 +89,7 @@ class FITSImage:
         if hasattr(self, "_pixelsize"):
             return self._pixelsize
         else:
-            return self.header["CDELT1"] * 3600  # [deg] -> [arcsec]
+            return abs(self.header["CDELT1"]) * 3600  # [deg] -> [arcsec]
 
     @pixelsize.setter
     def pixelsize(self, value):
@@ -114,7 +114,7 @@ class FITSImage:
         w.wcs.crval = np.array([hdr.get("CRVAL1", 0.0),
                                 hdr.get("CRVAL2", 0.0)])
         w.wcs.crpix = np.array([self.Ny/2+1, self.Nx/2+1])
-        w.wcs.cdelt = np.array([self.pixelsize/3600, self.pixelsize/3600])
+        w.wcs.cdelt = np.array([-self.pixelsize/3600, self.pixelsize/3600])
         w.wcs.cunit = [hdr.get("CUNIT1", "deg"), hdr.get("CUNIT2", "deg")]
         return w
 
diff --git a/astro/ps2d.py b/astro/ps2d.py
index 8852e97..cc4fdea 100755
--- a/astro/ps2d.py
+++ b/astro/ps2d.py
@@ -45,7 +45,7 @@ import astropy.constants as ac
 
 logging.basicConfig(level=logging.INFO,
                     format="%(asctime)s [%(levelname)s] %(message)s",
-                    datefmt="%Y-%m-%dT%H:%M:%S")
+                    datefmt="%H:%M:%S")
 logger = logging.getLogger(os.path.basename(sys.argv[0]))
 
 
@@ -416,7 +416,7 @@ def main():
     if args.pixelsize:
         pixelsize = args.pixelsize  # [arcsec]
     else:
-        pixelsize = wcs.wcs.cdelt[0] * 3600  # [deg] -> [arcsec]
+        pixelsize = abs(wcs.wcs.cdelt[0]) * 3600  # [deg] -> [arcsec]
 
     ps2d = PS2D(cube=cube, pixelsize=pixelsize, frequencies=frequencies,
                 window_name=args.window)