GRAV-D Block AS09 is located in the Alaska Time Zone, in the South half (South of 63 ° latitude). This was the ninth (09) block of data completed in that region.
Block Extent Data LinesThe following citations should be used in all presentations or publications that reference the GRAV-D work. Please replace the DATE tag in the following references with the date you downloaded the data or reports from the NGS website.
To reference the AS09 data file, reference the webpage:
GRAV-D Team (2018). "Gravity for the Redefinition of the American Vertical Datum (GRAV-D) Project, Airborne Gravity Data; Block AS09". Available DATE. Online at: http://www.ngs.noaa.gov/GRAV-D/data_AS09.shtml
To reference the block and survey details, reference the block user manual:
GRAV-D Team (2018). "Block AS09 (Alaska South 09); GRAV-D Airborne Gravity Data User Manual." Jeffery A Johnson and Jordan A Krcmaric ed. BETA Available DATE. Online at: http://www.ngs.noaa.gov/GRAV-D/data_AS09.shtml
To reference the general GRAV-D project operations, reference the General User Manual:
GRAV-D Team (2017). "GRAV-D General Airborne Gravity Data User Manual." Theresa Damiani, Monica Youngman, and Jeffery Johnson ed. Version 2.1. Available DATE. Online at: https://www.ngs.noaa.gov/GRAV-D/data_products.shtml