A

Ampere

AAA

Avionics Air Assembly

AAD

Attitude Anomaly Detector

AAS

Automatic Ambient Stowage

ABCL

As Built Configuration List

ABM

Apogee Boost Motor

ABMS

Apogee Boost Motor Subsystem

ABP

Aurora Board of Participants

ABS

Archiving / Back-up System

AC

Active Adjudication Committee
Alternating Current

ACAM

Assisted Circular Access Method

ACC

Attitude Control Computer

ACELP

Algebraic Code Excited Linear Prediction

ACE

Atmosphere and Climate Explorer

ACES

Atomic Clock Ensemble in Space

ACF

Access Control Facility

ACK

ACKnowledge

ACL

Access Control List

ACP

Accelerometer Package

ACR

Access Call Reconnect

ACS

Attitude Control System
Air Cooling System

ACSS

AoCS on-board Software

AD

Acceptance Data
Applicable Document
Architectural Design

ADC

Analog to Digital Converter
Atlantic Data Coverage

ADCU

Anomaly Detection and Control Unit

ADD

Architectural Design Document

ADE

Antenna Drive Electronics

ADEN

Alos Data European Node

ADEOS

Advanced Earth Observing Satellite

ADF

Alphanumeric Display File

ADEOS

Advanced Earth Observation Satellite

ADL

Advanced Disc Laser system

ADM-I

directorate of ADMinistration / Informatics department

ADP

Acceptance Data Package

ADR

Architectural Design Review

ADSM

Adstar Distributed Storage Manager

ADTI

Application Data Transfer Interface

ADU

Analog to Digital Units

AEC

Advanced Experiment Container

AEF

Apogee Engine Firing

AEP

Aocs Event Packet

AF

Archive Facility

AFC

Administrative and Finance Committee

AFEX

Advanced Furnace for microgravity Experiment with X-ray radiography

AFM

Atomic Force Microscope

AFP

Advanced Function Printing

AFR

Audit Finding Report

AGC

Automatic Gain Control

AGF

Advanced Ground Facility

AGN

Active Galactic Nuclei

AHF

Attitude History File

AHP

Aocs Housekeeping Packet

AHPR

Aocs Housekeeping Packet Reduced

AI

Action Item/Analysis Instruments

AIL

Action Item List

AIMS

Artes Information Management System

AIS

Application Infrastructure Support

AIT

Assembly, Integration and Testing

AIV

Assembly, Integration and Verification

AL

AirLock

ALOS

Advanced Land Observing Satellite
Advanced Land Observing System

AMA

Absolute Measurement Accuracy
Attitude Measurement Assembly

AMF

Apogee Motor Firing
Automatic mono-ellipsoidal Mirror Furnace facility

AMI

Absolute Memory Image
Active Micrograve Instrumentation

AML

Access Management Link

AMS

Activity Management System

AMSU/A

Advanced Microwave Sounding Unit A

AMT

Aocs Monitor Table

AND

Active Nutation Damping
Alphanumeric Display

ANITA

ANalysing Interferometer for Ambient Air

ANO

ANy Other

ANSI

American National Standards Institute

AO

Announcement of Opportunity
Ascent Orbit

AOB

Any Other Business

AOC

Attitude and Orbit Control

AOCE

Attitude and Orbit Control Electronics

AOCS

Attitude and Orbit Control (sub)System

AOGCMs

Atmosphere-Ocean General Circulation Models

AOS

Acquisition Of Signal

AP

Acknowledge Packet
Activation Phase
Application Program

APCF

Advanced Protein Crystallisation Facility

APD

Absolute Pointing Drift

APE

Absolute Pointing Error
Antenna Pointing Elements

APES

Antenna Pointing Elements

APEX

Ada Periodic Executive
Airborne Prism Experiment
Archive Packet Extractor

APF

Attitude Parameter File

APH

Attitude Pointing History

API

Application Program Interface

APIC

Advanced Programmable Interrupt Controller

APID

Application Process Identifier

APM

Attached Pressurised Module

APS

Active Pixel Sensors

APU

Analogue Processing Unit

AR

Acceptance Review

AR&C

Automated Rendezvous and Capture

ARD

Atmospheric Reentry Demonstrator

ARF

Archive Rolling File Importer

ARFI

Aocs Reference Frame
Archive Recordings File

ARGES

Atomic Radially Gravity Emission Spectroscopy

ARIS

Active Rack Isolation System

ARM

Apogee Raising Manoeuvre

ARO

Automatic Reconfiguration Order

ARP

Automated Rendez-vous Project

ARS

Action Request System

ARTEMIS

Advanced Relay and Technology MISsion

ARTES

Advanced Research in Telecommunications Systems

AS

Application System

ASA

Austrian Space Agency

ASAR

Advanced Synthetic Aperture Radar

ASC

Axaf Science Centre

ASCII

American Standard Code for Information Interchange

ASDA

Area Smoke Detector Assembly

ASDI

Active Directory Services Interface

ASGA

Advanced Solar Gallium-Arsenide Array

ASI

Agenzia Spaziale Italiana (Italian space agency)

ASIC

Application Specific Integrated Circuits

ASIM

Atmospheric Space Interactions Monitor

ASMS-TF

Advanced Satellite Mobile Systems - Task Force

ASN

Abstract Syntax Notation

ASTROM

ASTronautics Reference Object Model

ASU

Archive Support Unit

ASW

Address and Synchronisation Word

AT

Acceptance Test

ATAP

Archive TAPe reader

ATBD

Algorithm Theoretical Basis Document

ATCS

Automated/Automatic Temperature Controlled Stowage
Active Thermal Control System

ATH

Assembly and Test Houses

ATM

Asynchronous Transfer Mode

ATOS

Advanced Technology Operational System

ATR

Acceptance Test Review

ATRR

Acceptance Test Readiness Review

ATS

Assets Tracking System

ATSR

Along-Tracking Scanning Radiometer

ATSR/M

Along Track Scanning Radiometer and Microwave sounder

ATV

Automated Transfer Vehicle

ATV-CC

Automated Transfer Vehicle Control Centre

AU

Accounting Units

AUI

Attachment Unit Interface

AWARDS

Agency-Wide Administrative and Reporting Database System

AWG

Astronomy Working Group

AXAF

Advanced X-Ray Astrophysics Facility