With Filestar you get 0 different skills for working productively with DTED Level 1 Cell (.dt1) files.
About .Dt1
Name
DTED Level 1 Cell
Extension
.dt1
Format
Binary
Category
Raster Image
Developer
NGA (originally DMA)
Description
A DTED level 1 cell is one degree of terrain elevation at the level 1 resolution, stored as a .dt1 file. The cell holds 16-bit elevations in metres on WGS 84, written as 80-byte ASCII header records (UHL, DSI, ACC) followed by elevation records.