| 
DDD | 
| 
D/L
 | 
Downlink
 | 
| 
DA
 | 
Data Analysis | 
| 
DAC
 | 
Digital to Analog Converter
 | 
| 
DAD
 | 
Deployment Assist Device
 | 
| 
DAR
 | 
Deviation/Waiver Approval Request
 | 
| 
DC
 | 
Direct
 Current
 | 
| 
DCL
 | 
Document Change Log
 | 
| 
DDF
 | 
Director's
 Discretionary Fund | 
| 
DE
 | 
Dynamics Explorer
 | 
| 
DESPA
 | 
Space
 Science Group at Meudon
 | 
| 
DGSE
 | 
Development Ground Support Equipment
 | 
| 
DGSW
 | 
Development Ground Software
 | 
| 
DHU
 | 
Data Handling Unit
 | 
| 
DM
 | 
Development Model
 | 
| 
DMA
 | 
Direct
 Memory Access
 | 
| 
DMILL
 | 
Durci
 Mixte Isolant Logico Lineaire
 | 
| 
DMP
 | 
Development and Management Plan
 | 
| 
DMR
 | 
Detailed Mission
 Requirements | 
| 
DNL
 | 
Digital Noise Level or Differential Non-Linearity
 | 
| 
DOC
 | 
Degree
 of Constraint
 | 
| 
DOD
 | 
Depth
 of Discharge
 | 
| 
DPA
 | 
Destructive Physical Analysis
 | 
| 
DPD
 | 
Data Procurement Document
 | 
| 
DPU
 | 
Data Processing Unit
 | 
| 
DRAM
 | 
Dynamic Random Access Memory
 | 
| 
DRD
 | 
Data Requirements Description
 | 
| 
DRL
 | 
Data Requirements List
 | 
| 
DRL
 | 
Deutsches Zentrum fur Luft and Raumfahrt (Germany) | 
| DSAD | 
Digital Solar Attitude Sensor | 
| 
DSN
 | 
Deep Space Network
 | 
| 
DTRA
 | 
Defense
 Threat Reduction Agency | 
| 
DSP
 | 
Digital Signal Processor 
 | 
 
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