Acronyms

The following list includes acronyms used on system level and shall be common to all documents.

Acronyms that are only used in one document shall be defined at the beginning of the document and marked with a “only used in this document”.

	Meaning	Explanation	Used in / Link

	Meaning	Explanation	Used in / Link
A
ANDES	ArmazoNes high Dispersion Echelle Spectrograph
AD	Applicable Document	Legally binding documents and reports
ADC	Atmospheric Dispersion Corrector
AIT	Assembly, Integration and Test	In ESO terminology this is the phase in Europe that ends with the PAE (more general, should be MAIT)
AIV	Assembly, Integration and Verification	In ESO terminology this is the phase in Chile that ends with the PAC
AO	Adaptive Optics
ANDES	ArmazoNes high Dispersion Echelle Spectrograph	Name of the instrument	All documents
arcsec	Arc Second
B
BOL	Beginning of Life		ESO
C
CCD	Charged Coupled Device	Area detectors
CCF	Camera Control Framework
CCS	Central Control System
CIDL	Configuration Item Data List
CM	Configuration Manager
CND	Control Non Deterministic
CoC	Certificate of Conformity		Management Plan
COTS	Components of the shelf	Non-costumized products
CoG	Center of Gravity
CoM	Center of Mass
CR	Coudé-room	Part of the ELT	ESO
CU	Calibration Unit	Subcomponent
CD	Coudé Distributor
CDET	Control Deterministic
D
DAS	Data Analysis Software
DCS	Detector Control System
DDV	Design, Development and Verification Plan
DET	Detector
DF	DarkFiber
DPM	Data Product Manager
DRS	Data Reduction Software
DM	Deformable Mirror
E
EB	Executive Board		Management
EFL	Effective Focal Length	the distance from the principal point to the focal point
EH	Entrance Hall
ELT	Extremely Large Telescope
ESO	European Southern Observatory
ETRS	Element Technical Requirement Specifications
F
F2F	Fiber-To-Fiber link	In-fiber connection point
FAC	Final Acceptance Chile		ESO
FCS	Function Control System
FDR	Final Design Review	Milestone of the project, controlled by ESO	ESO
FE I-IV	Front End I-IV	Pickup of the beam coming from the telescope.
FFS	Flat-Field Sources	Calibration Sources used for Flat-Fielding	CU
FL-IFU	Fiber Link - Integral Field Unit
FMECA	Failure Mode, Effects, and Criticality Analysis
FoV	Field of View
FP	Fabry-Pérot	Etalon, Interferometer, Resonator in Literature
FR	Funding Review		ESO
FSR	Free Spectral Range	Spectral range between two spectral features
FTE	Full Time Equivalent	see below
FTS	Fourier-Transform Spectrograph
G
GigE	GigE connection
Gly	Glycol
GPS	Global Positioning System
GUI	Graphical User Interface
GN2	Gaseous Nitrogen
GTO	Guaranteed Time Observations
GUI	Graphical User Interface
H
HCL	Hollow-Cathode Lamps	Wavelength calibration lamps	CU
HIRES	High Resolution Spectrograph	Outdated name of the instrument /project -> ANDES
HE	Helium
HRT	Hard Real-Time
I
IAA	Instrument Assembly Area at Armazones
ICD	Interface Control Document	ESO-Standard, that is used to define Interfaces and their Responsibility
ICS	Instrument Control System
IF	Interfaces
IFW	Instrument Framework
IFU	Integral Field Unit
ILS	Instrumental Line Shape	See Definitions below
IP	Instrumental Profile	see also linespread function or ILS
IR	Infrared
IS	Instrument Scientist
IFU	Integral Field Unit
IFW	Instrument Framework
IS	Instrument Scientist
J

K

L
LCS	Local Control System
LCU	Local Control Unit
LDP	Light Distribution Point	Connects, switches light sources to the OUP of the CU
LG	Laser Guide		Conflict with Light Guiding CU subsystem
LGS	Laser Guide Star
LLI	Long Lead Item
LN2	Liquid nitrogen
LUT	Look-Up table
M
mas	Milli-arcseconds
MAIT	Manufacturing, Assembly, Integration and Test
MBSE	Model Base System Engineering
MS	Main Structure	WP that provides interfaces of subunits with environment	CU
MTBF	Mean Time Between Failure
N
NCR	No-Collapse Requirement	Where is used this?
NCR	Non-Conformance Report	Used in the subsystem-reviews. Is this ESO-standard?
ND	Nasmyth Distributor
NGS	Natural Guide Star
NI_CR	Network Infrastructure Computer Room
NIR	Near Infrared
O
OBS	Organization Breakdown Structure
OCS	Observation Coordination System
OM	Observing Mode
OUP	Output Port	Fiber ports used in the CU → Optical Interface to the Fiber WP
P
PA	Product Assurance
PAC	Preliminary Acceptance Chile
PAE	Preliminary Acceptance Europe	ESO-controlled milestone of the project
PBS	Product Breakdown Structure
PCF	Photonic Crystall Fibre	Used in the Astrocomb for spectral broadening
PD	Photodiode
PDR	Preliminary Design Review	ESO-controlled milestone of the project
PHL	Preliminary Hazard List
PI	Principal Investigator
PLC	Programmable Logic Controller
PFS	PreFocal Station
PM	Project Manager
PO	Project Office
PS	Project Scientist
PT	Product Tree
PTV	Peak To Valley
Q
QA	Quality Assurance
R
RBM	Rigid Body Motion
RCR	Review Conclusion Report
RD	Reference Documents	background references only.
RFW	Request for Waiver	To waive a requirement
rms	Root Mean Square	A statistical Value, see below
RP	Resolving Power	lambda/deltaLambda
RTC	Real Time Control
S
SA	System Architect
SAR	System Architecture Review
SC	Steering Committee
SCAO	Single Conjugate Adaptive Optics
SCS	Spectral Calibration Sources	Light sources providing spectral information that can be used for calibration.	CU
SCP	Service Connection Point
SCP_C	SCP Coudé
SCP_CR	SCP Computer Room
SCP_N	SCP Nasmyth
SE	Systems Engineer
SoW	Statement of Work
SR	Strehl Ratio	measure of the quality of optical image formation
SRT	Soft Real-Time
SSE	Software System Engineer
ssSE	Sub-System Engineer
ss (PT)	subsystem(s) (Project Team)	can be used as singular or plural
SOW	Statement of Work
ST	Science Team
SW	Software
SWSE	SoftWare-System-Engineer
T
TBC	To be Confirmed
TBD	To be Defined (frequently To be Discussed)
TCCD	Technical CCD
TLR	Top Level Requirement
TRL	Technical Readiness Level	see definitions
TRS	Technical Requirements Specification
TRES	Time Reference System
TSE	Thermal Self Emission
U
US	UBV Spectrograph
V
VIS	Visible Range of Light	(400 nm - 700 nm as defined by ISO Standards)
W
WBS	Work Breakdown Structure
WCS	World Coordinate System
WFS	WaveFront Sensor
WFRTC	Wave-Front Real-Time Computer
WG	Working Group
WLM	Wavelength Marker	frequency-stabilized Lasers, used in the CU to anchor the wavelength solution
WP	Work Package
WPM	Work Package Manager
X

Y
YS	YJH Spectrograph
Z