Rinex3NavData::Rinex3NavData(const RinexNavData& rnd) does not copy Cuc

[ahooper]

Rinex3NavData::Rinex3NavData(const RinexNavData& rnd) does not copy Cuc with the other harmonic corrections:

      // perturbations
      Cus = rnd.Cus;
      Crc = rnd.Crc;
      Crs = rnd.Crs;
      Cic = rnd.Cic;
      Cis = rnd.Cis;

This impairs orbit calculations done from the sample data files arlm200*.15n.