COSMOS Cosmological Evolution Survey

Cs-FEEP Cesium Field Emission Electric Propulsion

CsI cesium iode

CTE coefficient of thermal expansion

CZT cadmium-zinc-telluride

DDT&E design, development, test, and evaluation

DE dark energy

delta-v incremental change in velocity

DEP Dark Energy Probe

DES Dark Energy Survey

DESTINY Dark Energy Space Telescope

DETF Dark Energy Task Force

DOD Department of Defense

DoD degree of difficulty

DOE Department of Energy

DRS disturbance-reduction system

EELV evolved expendable launch vehicle

ELV expendable launch vehicle

EM engineering model

EMRI extreme mass-ratio inspiral

EOL end of life

EPIC-F Experimental Probe of Inflationary Cosmology

EPIC-I Einstein Polarization Interferometer for Cosmology

eROSITA extended Roentgen Survey with an Imaging Telescope Array

ESA European Space Agency

EXIST Energetic X-ray Imaging Survey Telescope

FEEP Field Emission Electric Propulsion

FGS fine guidance sensor

FMA flight mirror assembly

FOBAS Fast On-board Burst Alert System

FOV field of view

FPA focal plane array

FPGA field programmable gate array

GBT Green Bank Telescope

GLAST Gamma-ray Large Area Space Telescope

GPB Gravity Probe B

GPS Global Positioning System

GRACE Gravity Recovery and Climate Experiment

GRB gamma-ray burst

GRO Gamma Ray Observatory

GRS Gravitational Reference Sensor

GSFC Goddard Space Flight Center

HDF Hubble Deep Field

HEFT High Energy Focusing Telescope

HEI High Energy Imager

HEPAP High Energy Physics Advisory Panel

HERO High-Energy Replicated Optics

HET High Energy Telescope

HHT Heinrich Hertz Telescope

HST Hubble Space Telescope



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