diff --git a/csst_ifs_sim/__pycache__/csst_ifs_sim.cpython-311.pyc b/csst_ifs_sim/__pycache__/csst_ifs_sim.cpython-311.pyc
new file mode 100644
index 0000000000000000000000000000000000000000..7382b370ef4b987275a79ee6259f3541527d96fc
Binary files /dev/null and b/csst_ifs_sim/__pycache__/csst_ifs_sim.cpython-311.pyc differ
diff --git a/csst_ifs_sim/csst_ifs_sim.py b/csst_ifs_sim/csst_ifs_sim.py
index a4ea8f9d9b6202b14d709fcfe0536803971c5997..4d814fca166e748355028cea0c3fb42951cc45f8 100644
--- a/csst_ifs_sim/csst_ifs_sim.py
+++ b/csst_ifs_sim/csst_ifs_sim.py
@@ -1211,17 +1211,17 @@ def LSR_velocity(ra, dec, velocity, Obstime):
     # convert ra and dec to
     source = SkyCoord(ra*u.deg, dec*u.deg, frame='icrs',
                       unit=(u.hourangle, u.deg))
-    ll = source.galactic.l.deg
+    al = source.galactic.l.deg
     b = source.galactic.b.deg
-    c = SkyCoord(ll=ll*u.degree, b=b*u.degree, frame='galactic')
+    c = SkyCoord(l=al*u.degree, b=b*u.degree, frame='galactic')
     c_icrs = c.transform_to('icrs')
     barycorr = c_icrs.radial_velocity_correction(
         obstime=Time(Obstime), location=local)
     velocity = velocity + barycorr.value/1000
     # print(barycorr.value/1000)
-    ll = ll * np.pi / 180
+    cl = al * np.pi / 180
     b = b * np.pi / 180
-    return velocity + 9 * np.cos(ll) * np.cos(b) + 12 * np.sin(ll) * np.cos(b) + 7 * np.sin(b)
+    return velocity + 9 * np.cos(cl) * np.cos(b) + 12 * np.sin(cl) * np.cos(b) + 7 * np.sin(b)
 
 ###############################################################################
 
@@ -3477,7 +3477,7 @@ class IFSsimulator():
         # add random pointing error to telescope, the telescope poingt parameter in
         # fits header have random pointing error
         ud_ra = np.random.random()   # Choose a random shift in arcsec
-        self.information['ra_pnt0'] = self.information['dec_pnt0']+0.01*ud_ra
+        self.information['ra_pnt0'] = self.information['ra_pnt0']+0.01*ud_ra
 
         ud_dec = np.random.random()
         self.information['dec_pnt0'] = self.information['dec_pnt0']+0.01*ud_dec