The WSGL31 TTAAii Data Designators decode as: T1 (W): Warnings T1T2 (WS): SIGMET A1A2 (GL): Greenland (Remarks from Volume-C: NilReason)

The WVGL31 TTAAii Data Designators decode as: T1 (W): Warnings T1T2 (WV): Volcanic ash clouds (SIGMET) A1A2 (GL): Greenland (Remarks from Volume-C: NilReason)

In 1998, as part of the expedition NOGRAM I (Northern Gravity, Radio Echo Sounding and Magnetics), a flight campaign was carried out over the Lincoln Sea north of Greenland with the Polar 2 aircraft (Dornier 228-100) in cooperation with the Alfred Wegener Institute Helmholtz Center for Polar and Marine Research. A second flight campaign NOGRAM II took place in 2011 with the Polar 5 (Basler BT-67) over the Wandel Sea north of Greenland. The aim of the research was the structure and architecture of the upper Earth’s crust underneath the ice-covered offshore areas of the Morris Jesup Plateau and coastal waters north of Greenland. The airborne magnetic surveys were carried out with a flight line spacing of 3 km, and control profiles were flown every 30 km. During the two expeditions, 33000 km of line data were collected (16000 km in 1998, and 17000 km in 2011).

The SAGL31 TTAAii Data Designators decode as: T1 (S): Surface data T1T2 (SA): Aviation routine reports A1A2 (GL): Greenland (Remarks from Volume-C: NilReason)

The SAGL32 TTAAii Data Designators decode as: T1 (S): Surface data T1T2 (SA): Aviation routine reports A1A2 (GL): Greenland (Remarks from Volume-C: NilReason)

The UAGL61 TTAAii Data Designators decode as: T1 (U): Upper air data T1T2 (UA): Aircraft reports A1A2 (GL): Greenland T1T2ii (UA61): Special aircraft reports, except for volcanic ash (Remarks from Volume-C: NilReason)

The UAGL71 TTAAii Data Designators decode as: T1 (U): Upper air data T1T2 (UA): Aircraft reports A1A2 (GL): Greenland T1T2ii (UA71): Special aircraft reports, related to volcanic ash (Remarks from Volume-C: NilReason)

The FTGL31 TTAAii Data Designators decode as: T1 (F): Forecast T1T2 (FT): Aerodrome (VT >= 12 hours) A1A2 (GL): Greenland (Remarks from Volume-C: NilReason)

The FTGL32 TTAAii Data Designators decode as: T1 (F): Forecast T1T2 (FT): Aerodrome (VT >= 12 hours) A1A2 (GL): Greenland (Remarks from Volume-C: NilReason)

The FCGL45 TTAAii Data Designators decode as: T1 (F): Forecast T1T2 (FC): Aerodrome (VT < 12 hours) A1A2 (GL): Greenland (Remarks from Volume-C: NilReason)