* modify factor for measurement STDEV in gps update * add new ref_commit old-commit-hash: 3778592f5049e53b06d1fd6b11e08f59c6fee42a
* modify factor for measurement STDEV in gps update * add new ref_commit old-commit-hash: 3778592f5049e53b06d1fd6b11e08f59c6fee42a