diff --git a/trollsched/boundary.py b/trollsched/boundary.py
index d729a63..555c74d 100644
--- a/trollsched/boundary.py
+++ b/trollsched/boundary.py
@@ -78,6 +78,8 @@ def get_instrument_and_angle(self, overpass):
         elif instrument.startswith("mersi"):
             scan_angle = 55.4
             instrument = "avhrr"
+        elif instrument.startswith("slstr"):
+            instrument = "slstr"
         elif overpass.satellite.name.startswith("aws"):
             scan_angle = 55.25
             instrument = "avhrr"
@@ -104,6 +106,8 @@ def create_instrument_geometry(self, instrument, scans_nb, scanpoints, scan_step
             sgeom = instrument_fun(scans_nb, scanpoints, scan_step=scan_step)
         elif instrument in ["mhs", "atms", "mwhs-2"]:
             sgeom = instrument_fun(scans_nb, scanpoints)
+        elif instrument.startswith("slstr"):
+            sgeom = instrument_fun(scans_nb, scanpoints)
         else:
             logger.warning("Instrument not tested: %s", instrument)
             sgeom = instrument_fun(scans_nb)
diff --git a/trollsched/tests/test_satpass.py b/trollsched/tests/test_satpass.py
index 344f4d6..5ab36a1 100644
--- a/trollsched/tests/test_satpass.py
+++ b/trollsched/tests/test_satpass.py
@@ -166,6 +166,15 @@ def get_mb_orbital():
     return Orbital("Metop-B", line1=tle1, line2=tle2)
 
 
+def get_s3a_orbital():
+    """
+    From 2022-06-06
+    """
+    tle1 = "1 41335U 16011A   22157.82164820  .00000041  00000-0  34834-4 0  9994"
+    tle2 = "2 41335  98.6228 225.2825 0001265  95.7364 264.3961 14.26738817328255"
+    return Orbital("Sentinel-3A", line1=tle1, line2=tle2)
+
+
 class TestPass:
     """Tests for the Pass object."""
 
@@ -205,6 +214,7 @@ def setup_method(self):
         self.n20orb = get_n20_orbital()
         self.n19orb = get_n19_orbital()
         self.mborb = get_mb_orbital()
+        self.s3aorb = get_s3a_orbital()
         self.euron1 = AREA_DEF_EURON1
         self.antarctica = create_area_def(
             "antarctic",
@@ -348,6 +358,16 @@ def test_swath_coverage_fy3(self):
         cov = mypass.area_coverage(self.euron1)
         assert cov == pytest.approx(0.786836, 1e-5)
 
+        # Sentinel 3A slstr
+        tstart = datetime(2022, 6, 6, 19, 58, 0)
+        tend = tstart + timedelta(seconds=60)
+
+        tle1 = "1 41335U 16011A   22156.83983125  .00000043  00000-0  35700-4 0  9996"
+        tle2 = "2 41335  98.6228 224.3150 0001264  95.7697 264.3627 14.26738650328113"
+        mypass = Pass('SENTINEL 3A', tstart, tend, instrument='slstr', tle1=tle1, tle2=tle2)
+        cov = mypass.area_coverage(self.euron1)
+        self.assertAlmostEqual(cov, 0.05305641490480109, 6)
+
     def test_arctic_is_not_antarctic(self):
         """Test that artic and antarctic are not mixed up."""
         tstart = datetime(2021, 2, 3, 16, 28, 3)