diff --git a/src/hyp3_sdk/hyp3.py b/src/hyp3_sdk/hyp3.py
index 299c212..b4f3ed2 100644
--- a/src/hyp3_sdk/hyp3.py
+++ b/src/hyp3_sdk/hyp3.py
@@ -501,12 +501,14 @@ def prepare_insar_isce_burst_job(
             job_dict['name'] = name
         return job_dict
 
-    def submit_aria_s1_gunw_job(self, granule1: str, granule2: str, frame_id: int, name: str | None = None) -> Batch:
+    def submit_aria_s1_gunw_job(
+        self, reference: list[str], secondary: list[str], frame_id: int, name: str | None = None
+    ) -> Batch:
         """Submit an ARIA S1 GUNW job.
 
         Args:
-            granule1: The first granule (scene) to use
-            granule2: The second granule (scene) to use
+            reference: The name of the Sentinel-1 SLC granules to use as reference scenes for InSAR processing
+            secondary: The name of the Sentinel-1 SLC granules to use as secondary scenes for InSAR processing
             frame_id: Subset GUNW products to this frame
             name: A name for the job (optional)
 
@@ -519,12 +521,14 @@ def submit_aria_s1_gunw_job(self, granule1: str, granule2: str, frame_id: int, n
         return self.submit_prepared_jobs(prepared_jobs=job_dict)
 
     @classmethod
-    def prepare_aria_s1_gunw_job(cls, granule1: str, granule2: str, frame_id: int, name: str | None = None) -> dict:
+    def prepare_aria_s1_gunw_job(
+        cls, reference: list[str], secondary: list[str], frame_id: int, name: str | None = None
+    ) -> dict:
         """Prepare an ARIA S1 GUNW job.
 
         Args:
-            granule1: The first granule (scene) to use
-            granule2: The second granule (scene) to use
+            reference: The name of the Sentinel-1 SLC granules to use as reference scenes for InSAR processing
+            secondary: The name of the Sentinel-1 SLC granules to use as secondary scenes for InSAR processing
             frame_id: Subset GUNW products to this frame
             name: A name for the job
 
@@ -532,11 +536,11 @@ def prepare_aria_s1_gunw_job(cls, granule1: str, granule2: str, frame_id: int, n
             A dictionary containing the prepared ARIA S1 GUNW job
         """
         job_parameters = locals().copy()
-        for key in ['cls', 'granule1', 'granule2', 'frame_id', 'name']:
+        for key in ['cls', 'reference', 'secondary', 'frame_id', 'name']:
             job_parameters.pop(key)
 
         job_dict = {
-            'job_parameters': {'granules': [granule1, granule2], 'frame_id': frame_id, **job_parameters},
+            'job_parameters': {'reference': reference, 'secondary': secondary, 'frame_id': frame_id, **job_parameters},
             'job_type': 'ARIA_S1_GUNW',
         }
         if name is not None:
diff --git a/tests/test_hyp3.py b/tests/test_hyp3.py
index c40cdde..14226d6 100644
--- a/tests/test_hyp3.py
+++ b/tests/test_hyp3.py
@@ -322,20 +322,27 @@ def test_prepare_insar_isce_burst_job():
 
 
 def test_prepare_aria_s1_gunw_job():
-    assert HyP3.prepare_aria_s1_gunw_job(granule1='my_granule1', granule2='my_granule2', frame_id=100) == {
+    assert HyP3.prepare_aria_s1_gunw_job(
+        reference=['ref_granule1', 'ref_granule2'], secondary=['sec_granule1', 'sec_granule2'], frame_id=100
+    ) == {
         'job_type': 'ARIA_S1_GUNW',
         'job_parameters': {
-            'granules': ['my_granule1', 'my_granule2'],
+            'reference': ['ref_granule1', 'ref_granule2'],
+            'secondary': ['sec_granule1', 'sec_granule2'],
             'frame_id': 100,
         },
     }
     assert HyP3.prepare_aria_s1_gunw_job(
-        granule1='my_granule1', granule2='my_granule2', frame_id=100, name='my_name'
+        reference=['ref_granule1', 'ref_granule2'],
+        secondary=['sec_granule1', 'sec_granule2'],
+        frame_id=100,
+        name='my_name',
     ) == {
         'job_type': 'ARIA_S1_GUNW',
         'name': 'my_name',
         'job_parameters': {
-            'granules': ['my_granule1', 'my_granule2'],
+            'reference': ['ref_granule1', 'ref_granule2'],
+            'secondary': ['sec_granule1', 'sec_granule2'],
             'frame_id': 100,
         },
     }
@@ -395,11 +402,13 @@ def test_submit_insar_isce_burst_job(get_mock_hyp3, get_mock_job):
 
 @responses.activate
 def test_submit_aria_s1_gunw_job(get_mock_hyp3, get_mock_job):
-    job = get_mock_job('ARIA_S1_GUNW', job_parameters={'granules': ['g1', 'g2'], 'frame_id': 100})
+    job = get_mock_job(
+        'ARIA_S1_GUNW', job_parameters={'reference': ['g1', 'g2'], 'secondary': ['g1', 'g2'], 'frame_id': 100}
+    )
     api_response = {'jobs': [job.to_dict()]}
     api = get_mock_hyp3()
     responses.add(responses.POST, urljoin(api.url, '/jobs'), json=api_response)
-    batch = api.submit_aria_s1_gunw_job('g1', 'g2', 100)
+    batch = api.submit_aria_s1_gunw_job(['g1', 'g2'], ['g1', 'g2'], 100)
     assert batch.jobs[0] == job