diff --git a/test/objects/Satellite.test.ts b/test/objects/Satellite.test.ts
index 1d96575..136eae6 100644
--- a/test/objects/Satellite.test.ts
+++ b/test/objects/Satellite.test.ts
@@ -31,14 +31,6 @@ describe('Basic Satellite functionality', () => {
     expect(sat.satrec).toBeDefined();
   });
 
-  it('should allow chaining', () => {
-    const eci = new Satellite({ name: 'Test', tle1, tle2 }).propagateTo(dateObj).eci().position;
-
-    expect(eci.x).toBeCloseTo(6512.640035319078);
-    expect(eci.y).toBeCloseTo(-1545.524934684146);
-    expect(eci.z).toBeCloseTo(-1195.219347050479);
-  });
-
   it('should allow getting eci coordinates', () => {
     const sat = new Satellite({ name: 'Test', tle1, tle2 });
 
@@ -94,16 +86,9 @@ describe('Satellite', () => {
     expect(satellite).toMatchSnapshot();
   });
 
-  // can propagate to a given date
-  it('should propagate Satellite to a given date', () => {
-    satellite.propagateTo(exampleDate);
-
-    expect(satellite).toMatchSnapshot();
-  });
-
   // can calculate and return RAE coordinates
   it('should calculate and return RAE coordinates', () => {
-    const rae = satellite.rae(observer);
+    const rae = satellite.rae(observer, exampleDate);
 
     expect(rae).toMatchSnapshot();
   });
diff --git a/test/objects/__snapshots__/Satellite.test.ts.snap b/test/objects/__snapshots__/Satellite.test.ts.snap
index c3da6d3..e30aa35 100644
--- a/test/objects/__snapshots__/Satellite.test.ts.snap
+++ b/test/objects/__snapshots__/Satellite.test.ts.snap
@@ -59,15 +59,15 @@ Object {
 
 exports[`Satellite should calculate and return RAE coordinates 1`] = `
 RAE {
-  "azimuth": 6.113212092185137,
-  "azimuthRate": -0.053738284359553745,
-  "elevation": -0.8739811433607586,
-  "elevationRate": -0.017615972911599442,
+  "azimuth": 1.3489093210949852,
+  "azimuthRate": 0.031044709157512784,
+  "elevation": -1.2837885129141846,
+  "elevationRate": -0.03103994353789119,
   "epoch": EpochUTC {
-    "posix": 1705169134155,
+    "posix": 1705109326817,
   },
-  "range": 10316.599142891455,
-  "rangeRate": 2.3827483072818723,
+  "range": 12650.301530537545,
+  "rangeRate": 1.8799097918581538,
 }
 `;
 
@@ -244,172 +244,6 @@ Satellite {
   "sccNum6": "25544",
   "semiMajorAxis": 6794.6691566357185,
   "semiMinorAxis": 6794.668249267928,
-  "time": 2024-01-13T18:05:34.152Z,
-  "tle1": "1 25544U 98067A   22203.46960946  .00003068  00000+0  61583-4 0  9996",
-  "tle2": "2 25544  51.6415 161.8339 0005168  35.9781  54.7009 15.50067047350657",
-  "totalVelocity": 0,
-  "type": 0,
-  "velocity": Object {
-    "x": 0,
-    "y": 0,
-    "z": 0,
-  },
-}
-`;
-
-exports[`Satellite should propagate Satellite to a given date 1`] = `
-Satellite {
-  "active": true,
-  "apogee": 427.1806416558675,
-  "argOfPerigee": 35.9781,
-  "bstar": 0.000061583,
-  "eccentricity": 0.0005168,
-  "epochDay": 203.46960946,
-  "epochYear": 22,
-  "id": undefined,
-  "inclination": 51.6415,
-  "intlDes": "98067A",
-  "meanAnomaly": 54.7009,
-  "meanMoDev1": 0.00003068,
-  "meanMoDev2": 0,
-  "meanMotion": 15.50067047,
-  "name": "Unknown",
-  "options": Object {
-    "notes": "",
-  },
-  "perigee": 420.1576716155696,
-  "period": 92.89920734635164,
-  "position": Object {
-    "x": -5512.260085235448,
-    "y": -2430.686090702759,
-    "z": -3117.140819332331,
-  },
-  "rightAscension": 161.8339,
-  "satrec": Object {
-    "Om": null,
-    "PInco": 0,
-    "a": 1.0653855229682034,
-    "alta": 0.06593611420647338,
-    "altp": 0.06483493172993349,
-    "am": null,
-    "argpdot": 0.00004469391640450765,
-    "argpo": 0.6279363036117719,
-    "atime": 0,
-    "aycof": 0.0009194351859734261,
-    "bstar": 0.000061583,
-    "cc1": 1.054843477494549e-9,
-    "cc4": 0.0000010146140032928037,
-    "cc5": 0.000502156969435659,
-    "con41": 0.1553585313770025,
-    "d2": 8.920486693245565e-17,
-    "d2201": 0,
-    "d2211": 0,
-    "d3": 1.1284305919522795e-23,
-    "d3210": 0,
-    "d3222": 0,
-    "d4": 1.664351729935925e-30,
-    "d4410": 0,
-    "d4422": 0,
-    "d5220": 0,
-    "d5232": 0,
-    "d5421": 0,
-    "d5433": 0,
-    "dedt": 0,
-    "del1": 0,
-    "del2": 0,
-    "del3": 0,
-    "delmo": 1.0180635988014979,
-    "didt": 0,
-    "dmdt": 0,
-    "dnodt": 0,
-    "domdt": 0,
-    "e3": 0,
-    "ecco": 0.0005168,
-    "ee2": 0,
-    "em": null,
-    "epochdays": 203.46960946,
-    "epochyr": 22,
-    "error": 0,
-    "eta": 0.010357978846619898,
-    "gsto": 1.9068261868288872,
-    "im": null,
-    "inclo": 0.9013142056686517,
-    "init": "n",
-    "irez": 0,
-    "isimp": 0,
-    "j2": 0.001082616,
-    "j3": -0.00000253881,
-    "j3oj2": -0.002345069720011528,
-    "j4": -0.00000165597,
-    "jdsatepoch": 2459782.96960946,
-    "mdot": 0.06763444178039692,
-    "method": "n",
-    "mm": null,
-    "mo": 0.9547108088041661,
-    "mus": 398600.8,
-    "nddot": 0,
-    "ndot": 0.00003068,
-    "nm": null,
-    "no": 0.06762691649010695,
-    "nodecf": -2.2167955787538495e-13,
-    "nodedot": -0.00006007612419537387,
-    "nodeo": 2.8245343963432514,
-    "om": null,
-    "omgcof": 1.0625960227343085e-7,
-    "operationmode": "i",
-    "peo": 0,
-    "pgho": 0,
-    "pho": 0,
-    "plo": 0,
-    "radiusearthkm": 6378.135,
-    "satnum": "25544",
-    "se2": 0,
-    "se3": 0,
-    "sgh2": 0,
-    "sgh3": 0,
-    "sgh4": 0,
-    "sh2": 0,
-    "sh3": 0,
-    "si2": 0,
-    "si3": 0,
-    "sinmao": 0.8161466669458108,
-    "sl2": 0,
-    "sl3": 0,
-    "sl4": 0,
-    "t": 777012.542661354,
-    "t2cof": 1.5822652162418235e-9,
-    "t3cof": 9.143025645648123e-17,
-    "t4cof": 8.748455252805885e-24,
-    "t5cof": 1.0373269324942988e-30,
-    "tumin": 13.446839696959309,
-    "x1mth2": 0.6148804895409992,
-    "x7thm1": 1.6958365732130058,
-    "xfact": 0,
-    "xgh2": 0,
-    "xgh3": 0,
-    "xgh4": 0,
-    "xh2": 0,
-    "xh3": 0,
-    "xi2": 0,
-    "xi3": 0,
-    "xke": 0.07436691613317342,
-    "xl2": 0,
-    "xl3": 0,
-    "xl4": 0,
-    "xlamo": 0,
-    "xlcof": 0.0017312384987971355,
-    "xli": 0,
-    "xmcof": -0.001806247608164991,
-    "xni": 0,
-    "zmol": 0,
-    "zmos": 0,
-  },
-  "sccNum": "25544",
-  "sccNum5": "25544",
-  "sccNum6": "25544",
-  "semiMajorAxis": 6794.6691566357185,
-  "semiMinorAxis": 6794.668249267928,
-  "time": 2024-01-13T01:28:46.817Z,
   "tle1": "1 25544U 98067A   22203.46960946  .00003068  00000+0  61583-4 0  9996",
   "tle2": "2 25544  51.6415 161.8339 0005168  35.9781  54.7009 15.50067047350657",
   "totalVelocity": 0,