Performance of Stand-Alone GPS - Understanding GPS: Principles and Applications - page 356

− 150 − 120 − 90 − 60 − 30 0 30 60 90 120 150

90

90

60 60

30

30

0 0

− 30

− 30

− 60

− 60

− 90

− 90

− 150 − 120 − 90 − 60 − 30 0 30 60 90 120 150

1- to 5-minute outages
6- to 10-minute outages

11- to 20-minute outages
21- to 30-minute outages

31- to 40-minute outages
41- to 50-minute outages

Figure 7.24 FDE availability for NPA with baro aiding with a 5º mask angle.

Table 7.11 RAIM/FDE Availability with 2º Mask Angle and SA Off
RAIM/FDE Function En Route Terminal Nonprecision Approach

Fault detection 100% 100% 99.988%

Fault detection with
baro aiding

100% 100% 100%

Fault detection and
exclusion with baro
aiding

99.981% 99.904% 99.854%

Table 7.12 Maximum Duration of RAIM/FDE Outages with 2º Mask Angle and

SA Off
RAIM/FDE Function

En Route Terminal Nonprecision Approach

Fault detection 0 minutes 0 minutes 5 minutes

Fault detection with
baro aiding

0 minutes 0 minutes 0 minutes

Fault detection and
exclusion with baro
aiding

10 minutes 15 minutes 30 minutes

sent to a ground Earth station and uplinked to a geostationary satellite, along with
the geostationary satellite navigation message.