diff --git a/public/config.json b/public/config.json
index b24e03b..714efe6 100644
--- a/public/config.json
+++ b/public/config.json
@@ -3,7 +3,8 @@
   "pushHistory": false,
   "logLevel": "info",
   "satWorker": {
-    "runOnce": false
+    "runOnce": false,
+    "propergateIntervalMs": 16
   },
   "satelliteGroups": [
     {
diff --git a/src/viewer/Satellites.ts b/src/viewer/Satellites.ts
index 3d565a9..dcd7460 100644
--- a/src/viewer/Satellites.ts
+++ b/src/viewer/Satellites.ts
@@ -1,4 +1,4 @@
-import { SatelliteGroup } from '@satellite-viewer/SatelliteGroup';
+import SatelliteGroup from '@satellite-viewer/SatelliteGroup';
 import {
   Points,
   BufferGeometry,
diff --git a/src/viewer/workers/SatCruncherWorker.ts b/src/viewer/workers/SatCruncherWorker.ts
index f665de0..e8baa40 100644
--- a/src/viewer/workers/SatCruncherWorker.ts
+++ b/src/viewer/workers/SatCruncherWorker.ts
@@ -2,10 +2,9 @@ import {
   jday, twoline2satrec, eciToGeodetic, gstime, sgp4, SatRec
 } from 'satellite.js';
 import logger from '../../utils/logger';
-import constants from '../../config';
 
 const satCache: SatRec[] = [];
-const propergateInterval = constants.propergateInterval || 500;
+let propergateInterval = 500;
 let runOnce = false;
 let config: Record<string, any> = {};
 let satPos: Float32Array;
@@ -101,6 +100,10 @@ onmessage = function (message) {
         if (config.logLevel) {
           logger.setLogLevel(config.logLevel);
         }
+        if (config.propergateIntervalMs) {
+          propergateInterval = config.propergateIntervalMs;
+          logger.debug(`Adjusting propergateIntervalMs to be ${propergateInterval} ms`);
+        }
       }
       if (satData.state) {
         if (typeof satData.state.running === 'boolean') {