Iii data should be recorded for each test during the

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iii. Data should be recorded for each test during the specified "Period of Test" to determine the time at which the RAIM integrity limit alarm is activated. For a successful test, this alarm must not occur during the time from the start of the test to the time identified as the Page 18    (a)(3)(vii)  
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TSO-C129a "Earliest Alarm Time", but must occur between the time identified as "Earliest Alarm Time" and the "Latest Alarm Time". As shown below, a positive error rate in meters per minute is induced in either the identified SV pseudorange value or the barometric altimeter input beginning at the "Start Time of Ramp Error" and continuing throughout the test. The magnitude of the error rate is specified by the "Error Rate". Test No. Period of Test Error Source Start Time of Ramp Error Error Rate (Meters/Min. )* Earliest Alarm Time Latest Alarm Time 1 07:20 to 07:45 SV9 07:30 86.2 07:38:41 07:40:15 2 07:20 to 07:45 Altimeter 07:30 -275 07:35:35 07:36:31 3 01:35 to 01:55 SV12 01:42 135 01:51:02 01:52:12 4 01:35 to 01:55 Altimeter 01:42 200 01:50:18 01:53:13 5 00:40 to 00:55 SV15 00:43 26.6 00:51:08 00:52:38 6 00:40 to 00:55 Altimeter 00:43 50 00:48:36 00:51:17 7 02:45 to 03:05 SV7 02:52 19 02:59:56 03:02:02 8 02:45 to 03:05 Altimeter 02:52 37 03:01:05 03:03:44 * A positive SV error causes pseudorange which is smaller than the actual distance from the receiver to the SV. A positive altitude error causes a barometric altitude which is higher than the geometric altitude. 2. For Class A1, A2, B1, B2, C1, and C2 equipment, conduct the following tests with pressure altitude used as an input for GPS navigation and RAIM. For these tests, the GPS receiver should be simulated in motion, orbiting around the "Location" with the "Ground Speed" listed below for the test initial conditions. The receiver should be positioned at the appropriate geometric altitude with the specified pressure altitude input at the beginning of the test. These altitudes are either maintained or reduced as specified by the "Altitude Profile". The geometric altitude and the pressure altitude input should begin to be reduced at the "Time of Top of Descent" and should be reduced to the specified altitude at the "Time of Bottom of Descent". The initial conditions for these tests are as follows: 1Page 19
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TSO-C129a Test No. Location (Lat / Long) Altitude Profile (Feet) Time of Top of Desce nt Time of Botto m of Desce nt Integri ty Alarm Limit (nm) Faile d SV Initial SV Errors* (Meters) Initial Pressure Altitude Error** (Meters) Groun d Speed (Knots ) 1 42 ° N/ 87.5 ° W Level at 500 NA NA 1.0 SV3 SV14 & SV20:+33 SV12 & SV16:-33 +150 150 2 30 ° N/ 90 ° W Level at 500 NA NA 1.0 SV15 SV3, SV8 &SV21: +33 SV6 & SV10:-33 0 150 3 34 ° N/ 118 ° W 40,000 Descend to 18,000 01:42 01:52 1.0 SV17 SV5,SV10 & SV15:+33 SV7 : -33 +150 150 4 34 ° N/ 118 ° W 40,000 Descend to 18,000 01:42 01:52 1.0 SV17 SV5, SV10 & SV15:+33 SV7 & SV12:-33 0 150 5 34 ° N/ 118 ° W 18,000 Descend to 6,000 02:33 02:43 1.0 SV4 SV12 & SV17:+33 SV7 & SV15:-33 -150 150 6 34 ° N/ 118 ° W 18,000 Descend to 6,000 02:33 02:43 1.0 SV4 SV5,SV12 & SV17:+33 SV7 & SV15:-33 0 150 7 33 ° N/ 97 ° W 6,000 Descend to 500 03:35 03:45 1.0 SV15 SV5,SV12 & SV20:+33 SV17:-33 -150 150 8 33 ° N/ 97 ° W 6,000 Descend to 500 03:35 03:45 1.0 SV15 SV5, SV12 & SV20:+33 SV7 & SV17:-33 0 150 Page 20    (a)(3)(vii)  
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TSO-C129a Test No.
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