Patent ID: 8228491
Filing Date: 2012-07-24
Classification: B64F,G12B

Abstract:
1. A portable instrument used for testing a precision approach path indicator (PAPI), comprising: a cylindrical case having a first end and a second end that is opposite the first end; a focal lens located near the first end of the cylindrical case, wherein the focal lens is responsible for introducing a light beam emitted by the precision approach path indicator (PAPI) into the cylindrical case; a target plate located at a focal point of the focal lens near the second end of the cylindrical case, wherein the target plate is responsible for receiving the light beam emitted by the precision approach path indicator (PAPI) and determining one or more parameters associated with the precision approach path indicator (PAPI); an electronic horizontal incline angle sensor attached to the cylindrical case for determining a horizontal incline angle of the precision approach path indicator (PAPI); and an electronic vertical incline angle sensor attached to the cylindrical case for determining a vertical incline angle of the precision approach path indicator (PAPI).