Specifications

IntroductionGPS and Assisted GPS
16Operating Manual 1171.5248.12 ─ 15
2.6 Moving Scenarios
As it is part of the A-GPS test scenarios for 3GPP FDD and GSM (Performance Test
Scenario#3), the option Assisted GPS (R&S-K65) enhances the option GPS (R&S-K44)
by user-definable moving scenarios, which can also be used for testing stand-alone GPS-
receivers. The user has the possibility to define a movement by means of a so-called
"waypoint" file, which will lead to a "moving" of the connected GPS-receiver.
2.6.1 Waypoint file's formats
Two .txt formats can be used for the waypoint file:
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The first format is a list of coordinates (longitude, latitude, altitude) and a respective
resolution in milliseconds, as shown for the case of 3GPP Performance Test Sce-
nario#3 "Melbourne" (WGS 84 geodetic coordinates)
The resolution command at the beginning of the format specifies the sampling rate
to be used for the WGS-84 geodetic coordinates list.
RESOLUTION: 50
144.966666334601,-37.8166633061788,100.000000009313
144.966662392613,-37.8166632247233,100.000000039116
144.966658453002,-37.8166630889914,100.00000008475
144.966654516955,-37.8166628990241,100.000000149943
144.966650585658,-37.8166626548785,100.000000235625
144.966646660296,-37.8166623566284,100.000000339001
144.966642742053,-37.8166620043635,100.000000461936
144.966638832109,-37.81666159819,100.000000603497
144.966634931642,-37.8166611382304,100.000000762753
144.96663104183,-37.8166606246233,100.000000941567
144.966627163843,-37.8166600575235,100.000001138076
144.96662329885,-37.8166594371019,100.000001354143
144.966619448018,-37.8166587635456,100.000001588836
144.966615612505,-37.8166580370574,100.000001840293
144.966611793469,-37.8166572578565,100.00000211224
144.96660799206,-37.8166564261776,100.00000240095
144.966574759635,-37.8166466260761,100.00000580959
etc.
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The second format uses a script containing the commands defined in the following
table:
Command Description
REFERENCE: lon, Lat, alt Specifies the Cartesian Reference of the ENU coordinates system. Given
as a geodetic WGS-84 point (longitude, Latitude, Altitude).
START: E ,N, U, Velocity Start location i.e., initial "current location" in the ENU Cartesian coordi-
nate of center "REFERENCE". East, North and UP (ENU) coordinates
are then provided (m). The last argument is the start velocity in (m/s).
Moving Scenarios