diff --git a/pyproject.toml b/pyproject.toml
index e91397f1..01139cf0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -292,4 +292,4 @@ messages_control.disable = [
 ]
 
 [tool.setuptools.package-data]
-openlifu = ["nav/meshroom_pipelines/*.mg"]
+openlifu = ["nav/meshroom_pipelines/*.mg", "xdc/data/*.json"]
diff --git a/src/openlifu/xdc/data/__init__.py b/src/openlifu/xdc/data/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/src/openlifu/xdc/data/focal_gain_lut.json b/src/openlifu/xdc/data/focal_gain_lut.json
new file mode 100644
index 00000000..ebc0f05b
--- /dev/null
+++ b/src/openlifu/xdc/data/focal_gain_lut.json
@@ -0,0 +1,121 @@
+{
+  "dims": ["f0", "crosstalk"],
+  "attrs": {},
+  "data": [
+    [
+      2.807589054107666, 3.2286391258239746, 3.649686813354492,
+      3.8181092739105225, 4.07073974609375, 4.491786956787109,
+      4.912837505340576, 5.333885669708252, 5.754938125610352,
+      6.175983428955078, 6.597033500671387, 7.01808500289917
+    ],
+    [
+      2.90433931350708, 3.3324313163757324, 3.760524272918701,
+      3.931760549545288, 4.188616752624512, 4.616710662841797,
+      5.044803142547607, 5.472893714904785, 5.900986671447754,
+      6.3290791511535645, 6.757172107696533, 7.185482501983643
+    ],
+    [
+      2.9909276962280273, 3.428293466567993, 3.865659713745117,
+      4.040605068206787, 4.3030242919921875, 4.740390777587891,
+      5.1777544021606445, 5.615119934082031, 6.052487373352051,
+      6.489851951599121, 6.927217483520508, 7.364583969116211
+    ],
+    [
+      3.0771772861480713, 3.5201354026794434, 3.9643561840057373,
+      4.142045497894287, 4.408576965332031, 4.852799415588379,
+      5.297021865844727, 5.741242408752441, 6.185462474822998,
+      6.629685878753662, 7.073910713195801, 7.518129348754883
+    ],
+    [
+      3.170368194580078, 3.617199182510376, 4.064029693603516,
+      4.242762565612793, 4.51104211807251, 4.961826801300049,
+      5.4126152992248535, 5.863399505615234, 6.314184665679932,
+      6.764969825744629, 7.215755462646484, 7.666543960571289
+    ],
+    [
+      3.242729663848877, 3.6979565620422363, 4.153182506561279,
+      4.335274696350098, 4.6084089279174805, 5.064931869506836,
+      5.521984100341797, 5.979033946990967, 6.4360833168029785,
+      6.89313268661499, 7.350184440612793, 7.8072357177734375
+    ],
+    [
+      3.327850103378296, 3.783803701400757, 4.245124340057373,
+      4.429731845855713, 4.706640720367432, 5.168155193328857, 5.6296706199646,
+      6.091186046600342, 6.552703380584717, 7.014214992523193,
+      7.475728988647461, 7.937244415283203
+    ],
+    [
+      3.415055990219116, 3.8783867359161377, 4.341715335845947,
+      4.527048110961914, 4.8050456047058105, 5.268375396728516,
+      5.731706142425537, 6.195037841796875, 6.658364295959473, 7.12183952331543,
+      7.587955474853516, 8.054073333740234
+    ],
+    [
+      5.705652713775635, 5.966911792755127, 6.2332234382629395,
+      6.343565940856934, 6.509076118469238, 6.784928798675537,
+      7.060781478881836, 7.336633682250977, 7.612486362457275,
+      7.888339519500732, 8.164192199707031, 8.447998046875
+    ],
+    [
+      5.73893404006958, 5.998416423797607, 6.260423183441162, 6.365228652954102,
+      6.522432327270508, 6.784440994262695, 7.046449184417725,
+      7.310236930847168, 7.583878517150879, 7.8575215339660645,
+      8.131163597106934, 8.404805183410645
+    ],
+    [
+      5.780664920806885, 6.028132915496826, 6.275601387023926,
+      6.3745880126953125, 6.523068904876709, 6.777853965759277,
+      7.03900146484375, 7.300150394439697, 7.561298370361328, 7.822445869445801,
+      8.083595275878906, 8.350235939025879
+    ],
+    [
+      5.814091205596924, 6.0464091300964355, 6.284290313720703,
+      6.383488178253174, 6.532283306121826, 6.780277252197266,
+      7.028269290924072, 7.27626371383667, 7.524255752563477, 7.772250175476074,
+      8.040055274963379, 8.318523406982422
+    ],
+    [
+      5.836524486541748, 6.067535400390625, 6.301788806915283,
+      6.3954901695251465, 6.536042213439941, 6.770293712615967,
+      7.00454568862915, 7.238796710968018, 7.482921600341797, 7.740076541900635,
+      8.005291938781738, 8.270505905151367
+    ],
+    [
+      5.86801815032959, 6.0880255699157715, 6.308032989501953,
+      6.396038055419922, 6.528041839599609, 6.749823093414307,
+      6.9840264320373535, 7.218224048614502, 7.4528584480285645,
+      7.70409631729126, 7.955334663391113, 8.206572532653809
+    ],
+    [
+      5.892360210418701, 6.097702980041504, 6.303044319152832,
+      6.390904903411865, 6.523708343505859, 6.7450480461120605,
+      6.966385841369629, 7.187726020812988, 7.417387962341309,
+      7.661881923675537, 7.91318941116333, 8.164498329162598
+    ],
+    [
+      5.90617036819458, 6.104805946350098, 6.312875747680664, 6.396102428436279,
+      6.520944595336914, 6.729012966156006, 6.937082290649414, 7.15734338760376,
+      7.39542818069458, 7.6335129737854, 7.8715996742248535, 8.1096830368042
+    ]
+  ],
+  "coords": {
+    "f0": {
+      "dims": ["f0"],
+      "attrs": {},
+      "data": [
+        130000.0, 135000.0, 140000.0, 145000.0, 150000.0, 155000.0, 160000.0,
+        165000.0, 375000.0, 380000.0, 385000.0, 390000.0, 395000.0, 400000.0,
+        405000.0, 410000.0
+      ]
+    },
+    "crosstalk": {
+      "dims": ["crosstalk"],
+      "attrs": {},
+      "data": [
+        0.0, 0.05, 0.1, 0.12, 0.15000000000000002, 0.2, 0.25,
+        0.30000000000000004, 0.35000000000000003, 0.4, 0.45, 0.5
+      ]
+    }
+  },
+  "name": "focal_gain"
+}
diff --git a/src/openlifu/xdc/util.py b/src/openlifu/xdc/util.py
index e93d9e32..0cc313e6 100644
--- a/src/openlifu/xdc/util.py
+++ b/src/openlifu/xdc/util.py
@@ -10,234 +10,14 @@
 from openlifu.xdc.transducer import Transducer
 from openlifu.xdc.transducerarray import TransducerArray
 
-FOCAL_GAIN_LUT = xa.DataArray.from_dict(
-    {'dims': ('f0', 'crosstalk'),
- 'attrs': {},
- 'data': [[2.807589054107666,
-   3.2286391258239746,
-   3.649686813354492,
-   3.8181092739105225,
-   4.07073974609375,
-   4.491786956787109,
-   4.912837505340576,
-   5.333885669708252,
-   5.754938125610352,
-   6.175983428955078,
-   6.597033500671387,
-   7.01808500289917],
-  [2.90433931350708,
-   3.3324313163757324,
-   3.760524272918701,
-   3.931760549545288,
-   4.188616752624512,
-   4.616710662841797,
-   5.044803142547607,
-   5.472893714904785,
-   5.900986671447754,
-   6.3290791511535645,
-   6.757172107696533,
-   7.185482501983643],
-  [2.9909276962280273,
-   3.428293466567993,
-   3.865659713745117,
-   4.040605068206787,
-   4.3030242919921875,
-   4.740390777587891,
-   5.1777544021606445,
-   5.615119934082031,
-   6.052487373352051,
-   6.489851951599121,
-   6.927217483520508,
-   7.364583969116211],
-  [3.0771772861480713,
-   3.5201354026794434,
-   3.9643561840057373,
-   4.142045497894287,
-   4.408576965332031,
-   4.852799415588379,
-   5.297021865844727,
-   5.741242408752441,
-   6.185462474822998,
-   6.629685878753662,
-   7.073910713195801,
-   7.518129348754883],
-  [3.170368194580078,
-   3.617199182510376,
-   4.064029693603516,
-   4.242762565612793,
-   4.51104211807251,
-   4.961826801300049,
-   5.4126152992248535,
-   5.863399505615234,
-   6.314184665679932,
-   6.764969825744629,
-   7.215755462646484,
-   7.666543960571289],
-  [3.242729663848877,
-   3.6979565620422363,
-   4.153182506561279,
-   4.335274696350098,
-   4.6084089279174805,
-   5.064931869506836,
-   5.521984100341797,
-   5.979033946990967,
-   6.4360833168029785,
-   6.89313268661499,
-   7.350184440612793,
-   7.8072357177734375],
-  [3.327850103378296,
-   3.783803701400757,
-   4.245124340057373,
-   4.429731845855713,
-   4.706640720367432,
-   5.168155193328857,
-   5.6296706199646,
-   6.091186046600342,
-   6.552703380584717,
-   7.014214992523193,
-   7.475728988647461,
-   7.937244415283203],
-  [3.415055990219116,
-   3.8783867359161377,
-   4.341715335845947,
-   4.527048110961914,
-   4.8050456047058105,
-   5.268375396728516,
-   5.731706142425537,
-   6.195037841796875,
-   6.658364295959473,
-   7.12183952331543,
-   7.587955474853516,
-   8.054073333740234],
-  [5.705652713775635,
-   5.966911792755127,
-   6.2332234382629395,
-   6.343565940856934,
-   6.509076118469238,
-   6.784928798675537,
-   7.060781478881836,
-   7.336633682250977,
-   7.612486362457275,
-   7.888339519500732,
-   8.164192199707031,
-   8.447998046875],
-  [5.73893404006958,
-   5.998416423797607,
-   6.260423183441162,
-   6.365228652954102,
-   6.522432327270508,
-   6.784440994262695,
-   7.046449184417725,
-   7.310236930847168,
-   7.583878517150879,
-   7.8575215339660645,
-   8.131163597106934,
-   8.404805183410645],
-  [5.780664920806885,
-   6.028132915496826,
-   6.275601387023926,
-   6.3745880126953125,
-   6.523068904876709,
-   6.777853965759277,
-   7.03900146484375,
-   7.300150394439697,
-   7.561298370361328,
-   7.822445869445801,
-   8.083595275878906,
-   8.350235939025879],
-  [5.814091205596924,
-   6.0464091300964355,
-   6.284290313720703,
-   6.383488178253174,
-   6.532283306121826,
-   6.780277252197266,
-   7.028269290924072,
-   7.27626371383667,
-   7.524255752563477,
-   7.772250175476074,
-   8.040055274963379,
-   8.318523406982422],
-  [5.836524486541748,
-   6.067535400390625,
-   6.301788806915283,
-   6.3954901695251465,
-   6.536042213439941,
-   6.770293712615967,
-   7.00454568862915,
-   7.238796710968018,
-   7.482921600341797,
-   7.740076541900635,
-   8.005291938781738,
-   8.270505905151367],
-  [5.86801815032959,
-   6.0880255699157715,
-   6.308032989501953,
-   6.396038055419922,
-   6.528041839599609,
-   6.749823093414307,
-   6.9840264320373535,
-   7.218224048614502,
-   7.4528584480285645,
-   7.70409631729126,
-   7.955334663391113,
-   8.206572532653809],
-  [5.892360210418701,
-   6.097702980041504,
-   6.303044319152832,
-   6.390904903411865,
-   6.523708343505859,
-   6.7450480461120605,
-   6.966385841369629,
-   7.187726020812988,
-   7.417387962341309,
-   7.661881923675537,
-   7.91318941116333,
-   8.164498329162598],
-  [5.90617036819458,
-   6.104805946350098,
-   6.312875747680664,
-   6.396102428436279,
-   6.520944595336914,
-   6.729012966156006,
-   6.937082290649414,
-   7.15734338760376,
-   7.39542818069458,
-   7.6335129737854,
-   7.8715996742248535,
-   8.1096830368042]],
- 'coords': {'f0': {'dims': ('f0',),
-   'attrs': {},
-   'data': [130000.0,
-    135000.0,
-    140000.0,
-    145000.0,
-    150000.0,
-    155000.0,
-    160000.0,
-    165000.0,
-    375000.0,
-    380000.0,
-    385000.0,
-    390000.0,
-    395000.0,
-    400000.0,
-    405000.0,
-    410000.0]},
-  'crosstalk': {'dims': ('crosstalk',),
-   'attrs': {},
-   'data': [0.0,
-    0.05,
-    0.1,
-    0.12,
-    0.15000000000000002,
-    0.2,
-    0.25,
-    0.30000000000000004,
-    0.35000000000000003,
-    0.4,
-    0.45,
-    0.5]}},
- 'name': 'focal_gain'})
+
+def _load_focal_gain_lut() -> xa.DataArray:
+    resource = files("openlifu.xdc.data").joinpath("focal_gain_lut.json")
+    with resource.open("r", encoding="utf-8") as file:
+        return xa.DataArray.from_dict(json.load(file))
+
+
+FOCAL_GAIN_LUT = _load_focal_gain_lut()
 
 def load_transducer_from_file(transducer_filepath : PathLike, convert_array:bool = True) -> Transducer|TransducerArray:
     """Load a Transducer or TransducerArray from file, depending on the "type" field in the file.