GPS satellite outages

Words for: Navigation Systems

refracted
conductivity
ground wave
sky wave
space wave
propeller/rotor modulation error
ILS critical areas
St. Elmo's Fire
VOR/DME station
Traditional Navigation Systems
bidirectional
Morse code identifier
rotatable compass-card ADF
fixed-card ADF
movable-card ADF
gyrocompass
RMI slaving system
ADF needle
VOR needle
Homing
tracking
track inbound
track outbound
intercepting bearings
nonprecision instrument approaches
tracking inbound
tracking outbound
wingtip position
abeam a station
needle deflection
inbound bearing
outbound MB
slaving system
nondirectional radio beacon
Radial
courses
VOR transmitter
VOR ground station
ILS localizer frequency
OBS — omnibearing selector
full needle deflection
glideslope pointer
radiated test signal
CDI interpretation
logbook
VOR operational errors
VOR receiver accuracy check
VOT — VOR test facility
course roughness
dual system VOR
aircraft logbook
radiated VOT
very high frequency omnidirectional range
interrogating radio frequency (RF) pulses
distance measuring equipment
ILS/DME
DME components
Channel (Frequency) Selector
Interrogator
groundspeed
HOLD
Function of DME
wingtip reference
Intercepting Lead Radials
slant range distance
DME/DME fix
slant range
slant range error
interrogating signal
slant-range error
UHF spectrum
arc radius
LOM — Locator Outer Marker
area navigation
VOR/DME RNAV Components
WP — waypoint
Advanced Technologies
VOR/DME RNAV
RNAV mode
RNAV/APPR mode
RNAV route
VOR/DME RNAV errors
RNAV/APPR
WGS-84 — World Geodetic System of 1984
TSO C-129
ephemeris
triangulation
RAIM — Receiver Autonomous Integrity Monitoring
baro-aiding
barometric altimeter
TSO C-115a
FL 240
nonsequencing
OBS mode
GPS NOTAMs
GPS satellite outages
RAIM prediction
IAWP — Initial Approach Waypoint
FAWP — Final Approach Waypoint
MAWP — Missed Approach Waypoint
fly-over WPs
arm annunciation
step-down fixes
en route CDI sensitivity
satellite atomic clock inaccuracies
ionospheric delays
tropospheric delays
Terminal RAIM
ICAO Annex 10
GEO — Geostationary Satellite
Category I precision approaches
SBAS — Satellite-Based Augmentation Systems
EGNOS
MSAS — Japanese Multifunctional Transport Satellite Satellite-based Augmentation System
TSO-C145A
TSO-C146A
electronic glidepath
barometric aiding
GLONASS
Galileo
triangulate
WGS-84
IFR navigation
Oceanic Airspace
GPS Components
Global Positioning System
Navstar satellites
Block II/IIA/IIR and IIR-M satellites
Block IIF satellites
Function of GPS
ETA — Estimated TIME of Arrival
VFR
test and initialization
GPS Substitution
IFR Flight Using GPS
GPS Instrument Approaches
GPS overlay approaches
GPS stand-alone approaches
GPS Errors
System Status
GPS Familiarization
DGPS — Differential Global Positioning Systems
GEO synchronous satellites
GUS — GPS Uplink Station
barometric vertical navigation
VHF data broadcast
INS Components
IRS — inertial reference systems
laser gyros
INS Errors
INS/IRS
Inertial Navigation System
To Fly a DME Arc
NDB/Compass Locator
VOR/LOC Course
GNSS — Global Navigation Satellite System
Local Area Augmentation System (LAAS)
Instrument Landing System
Instrument Approach Systems
DME collocated with the GS transmitter
Category I approaches
Category II approaches
Category III approaches
LOC ground antenna array
three-letter designator
localizer course width
full-scale deflection
190—535 KHz
MALSF — medium intensity approach light system with sequenced flashing lights
ODALS — omnidirectional approach light system
ILS Airborne Components
ILS Function
ILS Errors
Operational Errors
localizer interception angle
LDA — Localizer Type Directional Aid
approach azimuth
back azimuth
Approach Azimuth Guidance
azimuth station
ILS Components
Ground Components
SSALR/MALSR
Below glidepath
On glidepath
Above glidepath
course centerline
FAF
microwave landing system
extended centerline
UHF Glideslope Transmitter
outer locator
middle locator
downwind light bars
upwind light bars
two-bar VASI
three-bar VASI
high-intensity flasher system
ALSF — Approach light system with sequenced flashing lights
false courses
FMS — Flight Management Systems
autothrottle
Radar Navigation (Ground-Based)
azimuth-indicating devices
interrogating unit
Airport Surface Detection Equipment
radarscope
radar vectors
RNP 0.3
RNP 1.0
RNP 2.0
Function of FMS
Radar Limitations
The Universal UNS-1
The Avidyne
The Garmin system
OpsSpecs — Operations Specifications
flightpath centerline
navigational accuracy
FMS computer
autothrottle systems
temperature inversions

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Plain English Meaning

Times when some GPS satellites are not working or not usable, which can make GPS navigation less accurate or unavailable in a particular area for a period of time.

Full Definition

Periods during which one or more Global Positioning System satellites are unavailable for navigation use, either because the satellite is out of service, broadcasting unreliable data, or temporarily not visible to the receiver in a way that degrades position accuracy. Predicted outages are published in advance through NOTAMs and through GPS receiver manufacturer prediction tools, and they may cause an approach or route segment to become unusable for a time window at a specific location.

Plain English Meaning

Full Definition

Context Anchor

Derivation

Why Pilots Care

Analogy

Grounding Statement

Intuition Check

Example Sentence 1

Example Sentence 2