Locus H-field Loran-C Antenna Development - PowerPoint

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					                              GPS/Loran System
 VHF     Localizer
          GBAS          ILS
                      Loc/Glide
 UHF     Glideslope
                        GLS         Approach
                                    Localizer/
                      Precision
L-band     GPS        Approach      Glideslope
                                    Deviations
                      Navigation
 LF        Loran                    Integration
                                    Processor
                                                                  Raw GPS-Receiver
                   GPS                               Delay        Time-Adjusted
Loran                                                             GPS-Receiver
                                                   GPS Only       GPS-Only
                                                                  Solution
       Measurement                                  Federated
        Processing                                                Federated
                                                  Least Squares   Solution
                                         RAIM
                                                     Solution
Measurement                              Master
 Processing        GPS
                                                                  Protection
                                                   RAIM-FDE       Bound
  Step
 Detector                    +
                                 Σ
                Loran                               Integrated
                                     –
                                                  Least Squares   Integrated
              ASF                                    Solution     Solution
              Filter
                                 ASF
                              Correction                          ASF
                       ASF   Measurements                         Corrections
                                                   Loran Only     Loran-Only
                                                                  Solution
                                                                  Loran-Receiver
                                       GPS Low-Availability Simulation
                                   Using Only GPS: SV6, SV10, SV24, SV30
            42.2
                                                                                        GPS-Only Solution
                                                                                        Integrated Solution
           42.19                                                                        Actual Position
                                                                                        1 km x 1 km

                                                                                      ASF Estimation
                                                                                       Filter Enabled
           42.18
Latitude




                                                                                  Simulated 5 m/s
                                                                                  GPS ramp error

           42.17




           42.16
                                                             1 km


                                                  1 km
           42.15
               -91.83   -91.82   -91.81   -91.8     -91.79    -91.78     -91.77   -91.76   -91.75   -91.74    -91.73
                                                             Longitude
                                      GPS Loran Test Flights
           43.6



                      1. CID Local 5/19/03
           43.2       2. CID to MSN 5/20/03
                      3. MSN Local 5/20/03
                      4. Orbits near MSN 5/21/03
           42.8       5. MSN to CID 5/21/03
Latitude

                      Ref. 10 km x 10 km



           42.4



                                                                   10 km
            42
                                                           10 km



           41.6
              -92.4   -92    -91.6    -91.2    -90.8      -90.4     -90    -89.6   -89.2   -88.8
                                              Longitude
                                         ASF Corrections CID to MSN
                1000

                                                                                      7980W Meas
                 800
                                                                                      7980W Est
                                                                                      9610Z Meas
                 600                                                                  9610Z Est
                                                                                      8970W Meas
                 400                                                                  8970W Est
ASF in meters




                                                                                      8970X Meas
                                                                                      8970X Est
                 200
                                                                                      8970Y Meas
                                                                                      8970Y Est
                   0
                                                                                      9610V Meas
                                                                                      9610V Est
                -200                                                                  8970Z Meas
                                                                                      8970Z Est
                -400                                                                  9960Z Meas
                                                                                      9960Z Est

                -600
                       0   5   10   15       20      25      30   35   40   45   50
                                               Time in minutes
                                                                                                                            Orbit test near Madison 5/21/03
                        Orbits near Madison Wisconsin 5/21/03                                           800
           43.15


                                                                                                        600
                              Integrated Lat
                              Federated Lat
           43.10              GPS-only Lat                                                              400




                                                                            ASF Corrections in meters
                                                                                                                                                                        8970W Meas
                              Loran-only Lat
                                                                                                                                                                        8970W Est
                              Loran receiver Lat
                              GPS receiver Lat
                                                                                                                                                                        8970X Meas
                                                                                                        200
                              1 km x 1 km                                                                                                                               8970X Est
Latitude




                                                                                                                                                                        8970Y Meas
           43.05
                                                                                                                                                                        8970Y Est
                                                                                                          0
                                                                                                                                                                        8970Z Meas
                                                                                                                                                                        8970Z Est
                                                                                                                                                                        9960Z Meas
                                                                                                        -200
                                                                                                                                                                        9960Z Est
                                    1km
           43.00
                             1km
                                                                                                        -400



                                                                                                        -600
           42.95                                                                                               0   5   10     15      20        25     30     35   40    45
               -89.55      -89.50     -89.45     -89.40   -89.35   -89.30
                                          Longitude                                                                                  Time in minutes
                                       GPS-Loran Flight Test
                                    CID approach and go-around
           41.93
                                                                                           Integrated
                                                                                           Federated
                                                                                           GPS-Only
           41.92
                                                                                           Loran-Only
                                                                                           Loran Receiver
                                                                                           GPS Receiver
           41.91
                                                                                           1 km x 1 km

                                            1 km
Latitude




            41.9
                                 1 km
                                                       GPS antenna disconnected
           41.89



           41.88



           41.87
               -91.78   -91.76     -91.74          -91.72        -91.7            -91.68       -91.66
                                                    Longitude
                                 GPS-Loran Flight Test
                          CID approach with no-GPS go-around
           41.90
                                                                               Integrated
                                                                               Federated
                                                                               GPS-Only
                                                                               Loran-Only
                                                         1 km                  Loran Receiver
                                                                               GPS Receiver
                                                                               1 km x 1 km
Latitude




           41.89
                                    1 km
                                 Integrated Solution with simulated
                                  GPS failure overlays first runway
                                       pass with working GPS




           41.88
               -91.74   -91.73               -91.72                   -91.71                 -91.70
                                            Longitude
                                            Alternative Solutions
           41.892
                         Loran only
                         GPS-IMU
                         Loran-ASF only
            41.89        IMU-Loran coasting
                         IMU coasting


           41.888
Latitude




           41.886
                                                                             50 x 50 m



           41.884




           41.882
               -91.725             -91.72              -91.715      -91.71          -91.705
                                                      Longitude
                                         Alternative Solutions
           41.8895
                          Loran only
                          GPS-IMU
            41.889        Loran-ASF only
                          IMU-Loran coasting
                          IMU coasting
           41.8885



            41.888
Latitude




           41.8875



            41.887



           41.8865



            41.886                                                         50 x 50 m
                -91.712                   -91.71                 -91.708               -91.706
                                                   Longitude

				
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