Survey number: AK08 (partial - Nabesna quad only) 
Name: East Alaska Range (Nabesna quad)
Date flown: 1971
Company: LKB (Lockwood, Kessler, and Bartlett, Inc - Pasadena, CA)
Flight specs: 0.75 mile, N-S, 1000 ft above ground.
Instrument: ?

Digitized by: Esther Castellanos, Digimap, 3/97
Map scale: 1:63,360 

Datum: Regional magnetic field value at -144W, 62.25N = 56,760 nT.
       Regional magnetic field (IGRF) removed.  Approximate value
       of regional = 5.2 nT/mile, N 57 E.

Publication: State of Alaska Open File maps (Nabesna quad)

Data format: Ascii format, XYZ records 
             Longitude (degrees), Latitude (degrees), Total Field (nT)
             written with FORTRAN format: (f10.5,x,f10.5,x,f8.1)

Background: These data were digitized under the direction of Rick Saltus 
            (saltus@usgs.gov) as part of the USGS project to merge the best 
            available aeromagnetic data into a consistent grid for the state 
            of Alaska.