dsf cleanup

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

@@ -79,13 +79,17 @@ public class UsgsDampingScaling {
    * TODO Disable subduction below 0.1s
    */
 
-  /** The range of supported damping ratios: {@code [0.5..30]}. */
+  /** The range of supported damping scaling factors: {@code [0.5..30]}. */
   public static final Range<Double> DAMPING_RATIO_RANGE = Range.closed(0.05, 30.0);
 
   private static final String[] DSF_KEYS =
       { "0.5", "1", "2", "3", "5", "7", "10", "15", "20", "25", "30" };
 
-  private static final List<Double> DSF_VALUES = Arrays.stream(DSF_KEYS)
+  /**
+   * The list of supported damping scaling factors (percentage values):
+   * {@code [0.5, 1, 2, 3, 5, 7, 10, 15, 20, 25, 30]}.
+   */
+  public static final List<Double> DSF_VALUES = Arrays.stream(DSF_KEYS)
       .map(Double::valueOf)
       .collect(toList());
 
@@ -148,7 +152,7 @@ public class UsgsDampingScaling {
     return XySequence.create(DSF_VALUES, corrCoeffs);
   }
 
-  /** The set of IMTs supported by this class. */
+  /** The set of IMTs supported by the damping models in this class. */
   public static final Set<Imt> supportedImts() {
     return INSTANCE_MAP.get(ACTIVE_CRUST).coeffs.keySet();
   }