field edits wus --> nga

src/main/java/gov/usgs/earthquake/nshmp/gmm/UsgsPrviBackbone2025.java

@@ -82,7 +82,7 @@ public abstract class UsgsPrviBackbone2025 implements GroundMotionModel {
 
     final double τ1, τ2, τ3, τ4;
     final double a, b;
-    final double φs2sPrvi, φs2sWus;
+    final double φs2sPrvi, φs2sNga;
     final double τSub, φSub, φSubSS, φSubS2S;
 
     Coefficients(
@@ -104,7 +104,7 @@ public abstract class UsgsPrviBackbone2025 implements GroundMotionModel {
 
       Map<String, Double> coeffsPhiS2S = ccPhiS2S.get(imt);
       φs2sPrvi = coeffsPhiS2S.get("phiS2S_PRVI");
-      φs2sWus = coeffsPhiS2S.get("phiS2S_WUS");
+      φs2sNga = coeffsPhiS2S.get("phiS2S_WUS");
 
       Map<String, Double> coeffsSubSigma = ccSubSigma.get(imt);
       τSub = coeffsSubSigma.get("tau_mean");
@@ -244,9 +244,9 @@ public abstract class UsgsPrviBackbone2025 implements GroundMotionModel {
       Coefficients c = super.coeffs;
       double τ = calcTau(in.Mw, c);
       double φSS = calcPhiSS(in.Mw, c);
-      double σWus = sqrt(τ * τ + c.φs2sWus * c.φs2sWus + φSS * φSS);
+      double σNga = sqrt(τ * τ + c.φs2sNga * c.φs2sNga + φSS * φSS);
       double σPrvi = sqrt(τ * τ + c.φs2sPrvi * c.φs2sPrvi + φSS * φSS);
-      return new double[] { σWus, σPrvi };
+      return new double[] { σNga, σPrvi };
     }
 
     // active crust tau
@@ -400,9 +400,9 @@ public abstract class UsgsPrviBackbone2025 implements GroundMotionModel {
     @Override
     double[] calcSigmas(GmmInput in) {
       Coefficients c = super.coeffs;
-      double σ = sqrt(c.τSub * c.τSub + c.φSub * c.φSub);
+      double σNga = sqrt(c.τSub * c.τSub + c.φSub * c.φSub);
       double σPrvi = sqrt(c.τSub * c.τSub + c.φSubS2S * c.φSubS2S + c.φSubSS * c.φSubSS);
-      return new double[] { σ, σPrvi };
+      return new double[] { σNga, σPrvi };
     }
   }
 
@@ -535,9 +535,9 @@ public abstract class UsgsPrviBackbone2025 implements GroundMotionModel {
     @Override
     double[] calcSigmas(GmmInput in) {
       Coefficients c = super.coeffs;
-      double σ = sqrt(c.τSub * c.τSub + c.φSub * c.φSub);
+      double σNga = sqrt(c.τSub * c.τSub + c.φSub * c.φSub);
       double σPrvi = sqrt(c.τSub * c.τSub + c.φSubS2S * c.φSubS2S + c.φSubSS * c.φSubSS);
-      return new double[] { σ, σPrvi };
+      return new double[] { σNga, σPrvi };
     }
   }