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WAAS NOTAM SYSTEM UPDATE
WAAS NOTAM SYSTEM UPDATE
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Презентация: «WAAS NOTAM SYSTEM UPDATE». Автор: MTONEY. Файл: «WAAS NOTAM SYSTEM UPDATE.ppt». Размер zip-архива: 116 КБ.

WAAS NOTAM SYSTEM UPDATE

содержание презентации «WAAS NOTAM SYSTEM UPDATE.ppt»
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1 WAAS NOTAM SYSTEM UPDATE

WAAS NOTAM SYSTEM UPDATE

SBAS Workshop

Gary Bobik, NOTAM procedures

June 22, 2005

2 WAAS NOTAMs

WAAS NOTAMs

For WAAS, a predictive modeling tool is required to determine availability The Service Volume Model (SVM) will generate WAAS service availability and NOTAMs associated with WAAS unavailability for a 48-your period at least once every 24 hours Should the SVM detect the loss of a GPS satellite or a WAAS asset outage, the SVM will auto generate a new service availability assessment and new unavailability NOTAMs

3 WAAS NOTAMs

WAAS NOTAMs

The WAAS service volume model resides on the military operations network server complex located at the David J. Hurley Air Traffic Control System Command Center (ATCSCC) in Herndon, Virginia Server sends a Service B message to either the U.S. NOTAM office or a specific flight service station with a proposed NOTAM to be issued Once received at either location, the NOTAM specialist/flight service specialist will check the format and content and follow their normal procedures to issue a NOTAM through the NOTAM system

4 WAAS NOTAMs

WAAS NOTAMs

The SVM tool can generate two types of NOTAMs: 1. WAAS Area NOTAMs issued through the U.S. NOTAM office and distributed under a Center’s identification 2. WAAS airport-specific NOTAMs issued throught the applicable Automated Flight Service Station and are airport specific

5 WAAS NOTAMs

WAAS NOTAMs

Example of WAAS Area NOTAMs: !KZDC KZDC WAAS LPV AND LNAV/VNAV MNS UNREL 341100N/1245600W TO 345100N/1232200W TO 342600N/1231900W TO 341700N/1245300W OR THE AML120123 TO AML 190200 TO RIC270150 TO RIC360220 WEF 05071011500-0507022630 This NOTAM indicates the vertical accuracy of WAAS for LPV and LNAV/VNAV approaches is predicted to be unreliable. This NOTAM is likely due to an atmospheric condition affecting a large area near Washington DC. The WAAS equipped aircraft could still fly the LNAV minimum, provided the GPS signal is not affected.

6 WAAS NOTAMs

WAAS NOTAMs

!KZDC KZDC WAAS LPV AND LNAV/VNAV MNS UNAVBL 341100N/1245600W TO 345100N/1232200W TO 342600N/1231900W TO 341700N/1245300W OR THE AML120123 TO AML 190200 TO RIC270150 TO RIC360220 WEF 05061011500 This NOTAM indicates the vertical accuracy for WAAS LPV and LNAV/VNAV approaches is unavailable. This NOTAM is likely due to a WAAS asset outage affecting a large area near Washington DC and will not have a date and time the outage will end. The WAAS equipped aircraft could still fly the LNAV minimum, provided the GPS signal is not affected.

7 WAAS NOTAMs

WAAS NOTAMs

Large scale WAAS service outages identified by WAAS Area NOTAMs can be caused by large ionosphere disturbances or a WAAS asset outage (e.g.,WAAS Reference Station or WAAS GEO out-of-service) Area NOTAMs caused by ionosphere disturbance will be predictive and have the word UNRELIABLE in the NOTAM These NOTAMs advise pilots that WAAS may not provide an acceptable level of service (Pre-flight planning info) WAAS asset outage will have the word UNAVAILABLE in the NOTAM These NOTAMs advise pilots that WAAS will not be available and controllers are required to include this info when they clear an aircraft for an RNAV approach if not carried in the ATIS broadcast

8 WAAS NOTAMs

WAAS NOTAMs

WAAS airport-specific NOTAMs are caused by the orientation of the satellites an aircraft will have available at a particular airport during specific times of the day. This is similar to using the RAIM prediction tool that was described in the GPS Computer Based Instruction. Airport-specific NOTAMs will have the word UNRELIABLE in the NOTAM since it is based on a prediction model. No controller action is required for these NOTAMs but Flight Service Specialists must past this information to pilots if WAAS status is requested. Site specific WAAS NOTAM: !OSH OSH WAAS LPV AND LNAV/VNAV MNS UNREL WEF 0506011700-0506011930 This NOTAM indicates the vertical accuracy of WAAS for LPV and LNAV/VNAV approaches is predicted to be unreliable. The WAAS equipped aircraft could still fly the LNAV minimums, provided the GPS signal is not affected. The aircraft could also fly the LPV or LNAV/VNAV minimums if the WAAS receiver indicates a good signal is being received upon arrival in the airport area.

9 WAAS NOTAMs

WAAS NOTAMs

Center-Wide NOTAM: LPV and LNAV/VNAV unreliable for all airfields in ZDC (Earliest start time and latest end time of all outages for airfields within the Center applied) !ZDC ZDC WAAS LPV AND LNAV/VNAV MNM UNREL WEF 0506241400-050624160 Output Display from WAAS SVM The output from the WAAS SVM that will be available for display on the WAAS O&M console has the following items: Area-wide WAAS NOTAMs Airfield-specific WAAS NOTAMs GPS satellite NOTAMs Detected loss of GPS almanac data Detected loss of WEI data NOTAM rejection messages

10 WAAS NOTAMs

WAAS NOTAMs

WAAS SVM Outputs The WAAS SVM generates un-numbered NOTAMs automatically formatted in U.S. domestic NOTAM format. The NOTAMs are numbered once they are accepted into the NOTAM system (after validation). The following types of area-wide and airfield-specific NOTAMs can be generated: Area Wide NOTAM #1: AOR-W and POR unavailable !FDC ZDC WAAS LPV AND LNAV/VNAV MNM UNAVBL WEF 0506161105 Area Wide NOTAM #2: AOR-W unavailable !KFDC KFDC WAAS LPV AND LNAV/VNAV MNM UNAVBL FOR THE REGION OF CONUS AND PUERTO RICO EAST OF 500000N/1133000W, 450000N/1113000W, 401200N/1100000W, 400000N/1095400W, 350000N/1084800W, 300000N/1074800W WEF 0506211318 Area Wide NOTAM #3: POR unavailable !KFDC KFDC WAAS LPV AND LNAV/VNAV MNM UNAVBL FOR ALASKA, HAWAII AND THE REGION OF CONUS WEST OF 500000N/1223000W, 450000N/ 1243000W, 433000N/1250000W, 400000N/1260600W, 350000N/1271200W, 300000N/1281200W WEF 0506250800

11 WAAS NOTAMs

WAAS NOTAMs

Area Wide NOTAM #4: En Route, LNAV, LNAV/VNAV, and LPV unreliable !FDC FDC WAAS UNREL 341100N/1245600W TO 345100N/1232200W TO 342600N/1231900W TO 341700N/1245300W OR THE AML120123 TO AML 190200 TO RIC270150 TO RIC360220 WEF 0506231200-0506231745 Airfield-Specific NOTAM #1: LNAV, LNAV/VNAV, and LPV unreliable !BOS BOS WAAS MNM UNREL WEF 0506241500-0506241630 Airfield-Specific NOTAM #2: LNAV/VNAV unreliable and airfield does not support LPV !MCO MCO WAAS LNAV/VNAV MNM UNREL WEF 0506242058-0506242209 Airfield-Specific NOTAM #3: LPV and LNAV/VNAV unreliable !DCA DCA WAAS LPV AND LNAV/VNAV MNM UNREL WEF 0506241425-0506241533

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