TALENT KEYHOLE TK covers space-based IMINT (Imagery Intelligence). Sounds like satellite intelligence or signal intelligence.
Key Hole (KH) is the designation for a series of American optical reconnaissance satellites:
KH-1 Corona
KH-2 Corona
KH-3 Corona
KH-4 Corona
KH-5 Argon
KH-6 Lanyard
KH-7 Gambit
KH-8 Gambit 3
KH-9 Hexagon/Big Bird
KH-10 Dorian/Manned Orbiting Laboratory
KH-11 Crystal/Kennan
KH-12 Improved Crystal/Ikon/Advanced Kennan
KH-13 (unofficial designation, sometimes applied to Enhanced Imaging System or Misty)