ENR 5.3 OTHER ACTIVITIES OF DANGEROUS NATURE

1 Release Of Radio - Sond MET Balloon

Weather Balloons will be released by Aero-meteorological Observatory – Viet Nam Meteorological and Hydrological Administration for MET observation at:
1.1 Upper Air Observatory (212140.17N – 1030031.9E), bearing 010/090 Mag and distance 5 360m from ARP of Dien Bien Airport (212351.58N – 1030032.76E).
1.2 Upper Air Observatory (210205.5N – 1054813.76E), bearing 001/181 Mag and distance 22 705m from ARP of Noi Bai Airport (211318.00N – 1054820.00E).
1.3 Upper Air Observatory (184032.83N – 1054125.69E), bearing 351/171 Mag and distance 5 262m from ARP of Vinh Airport (184349.33N – 1054032.96E).
1.4 Upper Air Observatory (160233.68N – 1081223.17E), bearing 001/181Mag and distance 1 168m from ARP of Da Nang Airport (160238.00N – 1081201.00E).
1.5 Upper Air Observatory (103934.14N – 1064341.03E), bearing 313/133 Mag and distance 5 941m from ARP of Tan Son Nhat Airport (104914.00N – 1063939.00E).
1.6 Upper Air Observatory (201159N – 1074358E).
1.2 Released Equipment Characteristics
  • Rate of averageascent of balloon: 300m – 480m per minute;
  • Maximum height of balloon: 35km;
  • Balloon: Rubber, white colour (uncolour), when releasing, the balloon is filled with Hydro and not lighted;
  • Weight of balloon: 780g;
  • Diameter of balloon: 120cm;
  • The balloon is attached with Radio-sond MET equipment;
  • Weight of Radio-sond MET equipment (without unwinder): 109g;
  • Size of Radio-sond MET equipment (Width, Length, Height): 6.3cm x 27.2cm x 10.4cm;
  • The balloon will burst 1.5 hours after release and Radio-sond MET equipment will descent within 100km.
1.3 The timetable to be released of Radio-sond MET Balloon
Time to Release Observation Equipment for Routine Observation
(Local Time)
Time to Release Observation Equipment for Enhanced Observation
(Local Time)
Name of Station/
Location
Coordinates
(WGS-84)
Times to Release per day
Morning
Evening
Times to Release per day
Noon
Evening
Night
01
Dien Bien
212140.17N – 1030031.9E
From 0645 to 0700
To be advised later
From 1245 to 1300
From 1845 to 1900
From 0045 to 0100
02
Ha Noi
210205.5N – 1054813.76E
From 0645 to 0700
From 1845 to 1900
To be advised later
From 1245 to 1300
From 0045 to 0100
01
Vinh
184032.83N – 1054125.69E
From 0645 to 0700
To be advised later
From 1245 to 1300
From 1845 to 1900
From 0045 to 0100
02
Da Nang
160233.68N – 1081223.17E
From 0645 to 0700
From 1845 to 1900
To be advised later
From 1245 to 1300

From 0045 to 0100
02
Tan Son Hoa
103934.14N – 1064341.03E
From 0645 to 0700
From 1845 to 1900
To be advised later
From 1245 to 1300

From 0045 to 0100
01
Bach Long Vi
201159N – 1074358E
From 0645 to 0700

To be advised later
From 1245 to 1300
From 1845 to 1900
From 0045 to 0100
Notes:
  • At night a small lantern lighted with candle is attached.
  • Balloons and equipment to be released at all stations are physically alike.
  • Observation duration: 90 minutes since equipment release.
  • In case the release has to be redone, time of release in the morning or evening (for routine observation), and at noon or night (for enhanced observation) shall be at the latest 0800 or 2000, and 1400 or 0200 respectively.