ENR 4.3 GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS)

1 Operational procedure of RAIM Prediction Service in Viet Nam

1.1 Type of RAIM prediction
a. En-route: RNAV 10 (RNP 10), RNAV 5, RNAV 2, RNP 4, RNP 2.
  • Continental area: RNAV 5;
  • Oceanic area: RNP 4, RNP 10.
b. Terminal: RNAV 1, RNP 1.
  • Departure procedure (SIDs): RNP 1, RNAV 1;
  • Arrival procedure (STARs): RNP 1, RNAV 1.
c. Approach: RNP APCH.
  • RNAV (GNSS) APPROACH;
  • RNAV (GNSS) Baro VNAV APPROACH;
  • RNP (GNSS) APPROACH.
1.2 Information of RAIM prediction
Predictions are conductedmade daily at 2200 UTC; with maximum validity of 72 HR from prediction time.
Predictions are made for periods within which RAIM outage is more than 5 minutes;
Pilots are requested to check RAIM Predictions via website or via NOTAMs.
If unavailable time period of RAIM function is predicted for more than 5 minutes, the time period is provided.
Before the flight, pilots are requested to check RAIM availability information from the NETRA RAIM website or NOTAMs.
1.3 Provision of RAIM Prediction Service
RAIM Prediction Service is provided via:
  • Via NOTAM: Issued in series J.
  • Website: https://raimpro.spacekeys.aero.
  • Via website: http://www.netra.aero
Notes:
Note:
  • RAIM prediction NOTAM is only issued for departure, arrival and approach procedures at aerodromes (applied PBN procedures) in Viet Nam.
  • RAIM prediction information on ATS routes is provided via website.
  • RAIM prediction NOTAM is issued for Terminal and Approach (departure, arrival and approach procedures) only.
  • RAIM prediction information on ATS routes is provided via website.
1.4 RAIM Prediction NOTAM
Example of NOTAM series J message is as follows:
(JXXXX/YY NOTAMN
Q)VVHN/QGAAU/I/NBO/A/000/999/2113N10548E025 A)VVNB B)2101211045
C)2101211115
E) GPS RAIM NOT AVAILABLE FOR RNP APPROACH: TSO-C146A FAULT DETECTION WITH EXCLUSION 2101211045/2101211115.)
Explanation: The above RAIM Prediction NOTAM at Noi Bai International Airport (VVNB) means that there is GPS RAIM outage on 21 JAN 2021, from 1045 to 1115 for receiver equipment TSO-C146A Fault Detection with Exclusion. During this time, GPS RAIM is predicted unavailable for RNP Approach.
(JXXXX/YY NOTAM N
Q)VVHM/QGAXX/I/NBO/A/000/999/1624N10742E005
A)VVPB
B)1602010000
C)1602022359
E) GPS RAIM PREDICTION FOR:
TSO-C129 FAULT DETECTION
NO GPS RAIM OUTAGES
TSO-C146A FAULT DETECTION ONLY
NO GPS RAIM OUTAGES
TSO-C146A FAULT DETECTION WITH EXCLUSION
20160201 0500 TIL 20160201 0515
20160202 0505 TIL 20160202 0513
GPS RAIM UNAVAILABLE FOR RNP APPROACH).
The above sample NOTAM means that at Phu Bai International Airport (VVPB) there is no GPS RAIM outage for receiver equipment TSO-C129 Fault Detection or TSO-C146A Fault Detection.
There is GPS RAIM outage on 01 FEB 2016, from 0500 to 0515 and on 02 FEB 2016, from 0505 to 0513 for receiver equipment TSO-C146A Fault Detection with Exclusion during which GPS RAIM is unavailable for RNP Approach.
Please contact the following address for any queries on RAIM Prediction NOTAM:
Post:International NOTAM Office (NOF)
Viet Nam Aeronautical Information Centre (VNAIC)
Viet Nam Air Traffic Management Corporation (VATM)
200/5, Nguyen Son Street, Long Bien District
Ha Noi 10 000, Viet Nam
Tel:(84-24) 38 720 619 or (84-24) 38 271 513/14
ext: 8248 (H24), 8215, 8627, 8732 (office hours)
Fax:(84-24) 38 728 781
Web:www.vnaic.vn
Email:nof@vatm.vn (primary)
nof@vnaic.vn (standby)
nof@vnaic.vn
AFS:VVVVYNYX
1.5 RAIM Prediction service viaon websitethe Internet
Operators are able to search for RAIM Prediction via website: https://raimpro.spacekeys.aero.
Accessing RAIM availability information using the website can be done with a PC and Internet access.
Note: Operators (ATS units, ARO/AIS offices, airlines whose flights are landed at/taken off from related aerodromes of Viet Nam) use granted accounts to access the website, check RAIM prediction information in order to ensure the complete information before the flight.
This information can be found at website:
Please contact the following address for account to access website for RAIM availability information:
http://www.netra.aero
Post:AIP Division
Viet Nam Aeronautical Information Centre (VNAIC)
VietNam Air Traffic Management Corporation (VATM)
200/5, Nguyen Son Street, Long Bien District
Ha Noi, Viet Nam
Tel:(84-24) 38 728 521 or (84-24) 38 271 513 ext: 8653, 8416, 8526
Fax:(84 - 24) 38 725 687
Web:www.vnaic.vn
Email:aip@vnaic.vn
aip_vatm@vatm.vn
AFS:VVVVYOYP
  • Login with granted account;
  • Select the Tools you wish to use (Status, Visibility, Region, Aerodrome, Route).
Note:
Free accounts can be provided for ATS units, related AIS-ARO offices, domestic airlines and international airlines whose flight are landed at/taken off at related aerodromes of Viet Nam, if necessary.
Please contact the following address for accounts to access website for RAIM availability information:
Post:AIP Division
Viet Nam Aeronautical Information Centre (VNAIC)
Viet Nam Air Traffic Management Corporation (VATM)
200/5, Nguyen Son Street, Long Bien District
Ha Noi 10 000, Viet Nam
Tel:(84-24) 38 728 521 or (84-24) 38 271 513/14
ext: 8653
Fax:(84-24) 38 725 687
Web:www.vnaic.vn
Email:aip@vnaic.vn
AFS:VVVVYOYP