Use speeds from IHO doc

Author: bkeepers

packages/tide-predictor/test/constituents/index.test.ts

@@ -132,8 +132,7 @@ describe("Base constituent definitions", () => {
 
   it("has correct properties for 2MS6 (quarter-diurnal M2-S2 interaction)", () => {
     expect(constituents["2MS6"]).toBeDefined();
-    const expectedSpeed = 2 * constituents.M2.speed(testAstro) + constituents.S2.speed(testAstro);
-    expect(constituents["2MS6"].speed(testAstro)).toBeCloseTo(expectedSpeed, 2);
+    expect(constituents["2MS6"].speed(testAstro)).toBeCloseTo(87.9682085, 7);
   });
 
   it("has correct properties for 2MK5 (quinte-diurnal M2-K1 interaction)", () => {
@@ -144,7 +143,6 @@ describe("Base constituent definitions", () => {
 
   it("has correct properties for 2MO5 (quinte-diurnal M2-O1 interaction)", () => {
     expect(constituents["2MO5"]).toBeDefined();
-    const expectedSpeed = 2 * constituents.M2.speed(testAstro) + constituents.O1.speed(testAstro);
-    expect(constituents["2MO5"].speed(testAstro)).toBeCloseTo(expectedSpeed, 2);
+    expect(constituents["2MO5"].speed(testAstro)).toBeCloseTo(71.911244, 6);
   });
 });