Bug : NullPointerException in the method named interpolate() in FieldSpacecraftState.java
In the method interpolate() in FieldSpacecraftState.java, the orbit field is used to make an array. However the orbit can be null is AbsolutePVCoordinates are used. Therefore we obtain in this case a NullPointerException.
the line : final T mm = MathArrays.buildArray(orbit.getA().getField(), 1); could be change such as : final T mm = MathArrays.buildArray(date.getField(), 1);