Glossary#

Terms you will meet in ATLAS and its documentation. ATLAS means the whole ecosystem. ATLAS Viewer (or Viewer) means the analysis application.

A#

ADS (ATLAS Data Server): Receives live telemetry and distributes it to ATLAS clients. See ATLAS Data Server.
Application group: A group of parameters from one source or subsystem, for example Chassis or Engine. Defined by the logging system. Shown as a tree in the Parameter Browser. Also called an application.
Alarm: A condition on parameters that Viewer flags when it occurs. See Alarms.
Automation API: An API for controlling Viewer from code. See Automating it.

B#

Bridge Service: Decodes raw ADS data into engineering values and publishes it to a broker. Part of Open Streaming.

C#

Compare set: One or more sessions loaded together. Displays point at a set, and sessions in the same set can be overlaid. Also called a set. See Loading sessions.
Composite session: Several sessions appended into one continuous timeline. Also called an appended session.

D#

Display: A single visualisation on a page: Waveform, Numeric, Scatterplot and so on. See Displays.
Display API: An API for building custom displays that run inside Viewer.

E#

ECU: Electronic control unit. System Monitor configures and calibrates Motion Applied ECUs.
Event: A time-stamped occurrence recorded by an ECU, such as a fault. Shown in the Event display. Compare with marker.

F#

FDL (Function Definition Language): The language used to write functions in the Function Editor. See Functions.
Function: A user-defined calculation on session data that is used like a parameter. Written in FDL, C# or MATLAB.

K#

Kafka: The message broker used by Open Streaming.

L#

Lap: A labelled segment of a session. In motorsport, a trip round a circuit. In general, any repeated cycle or phase. See Laps.
Live session: See telemetry session.

M#

Marker: A user-defined labelled point or range in a session, with optional labels, values and units. See Markers.

O#

Open Streaming: The Kafka-based, open-schema streaming layer of ATLAS. See Open Streaming.

P#

Page: A tab in a workbook that holds displays.
Parameter: A measured or calculated signal, identified as name:application, for example vCar:Chassis. Other tools may call this a channel or a signal.
Parameter Browser: The panel for finding and adding parameters (P).

R#

RDA (Reduced Data Access): A System Monitor feature that restricts sharing of data and set-ups between applications, according to licence. See RDA.
RDS (Remote Data Server): Lets a client listen to an ADS on another network over a WAN. See RDS.
Recorder: A connection that captures live or offloaded data and writes it into a session. Created in the Session Browser. See Getting your data in.
RTA (Remote Telemetry Architecture): An architecture for connecting ATLAS to your own existing database through a data adapter. See RTA.

S#

Session: One recording with its metadata, laps, events and parameter data. Either historical (finished) or telemetry (live).
Session Browser: The tool for finding, loading, recording and managing sessions (Ctrl+L).
Set: See compare set.
SQL Race: The session data layer behind ATLAS. Provides the database, and the API for reading and writing sessions. See SQL Race.
SQL Race API: The API for reading, writing and searching session data from code.
SRMS (SQL Race Management Studio): The tool for organising, bulk-importing and auto-importing sessions in a SQL Race database.
SSN / SSN2: ATLAS session files. SSN2 is the current format. SSN is the legacy format, which can still be loaded.
Stream API: The standard API for reading and writing telemetry on the broker in Open Streaming.
System Monitor: The application for configuring, calibrating and tuning Motion Applied ECUs and data loggers.

T#

Telemetry session: A session that is still being recorded, and shown in Viewer as data arrives. Becomes historical when recording ends.
Timebase: The time range a display shows. Timeline: the bar at the top of the Viewer window that controls it.

V#

Virtual parameter: A parameter calculated from other parameters, rather than measured. Can be produced by Functions, vTAG, or the Virtual Parameter Service.
vTAG Server / vTAG Service: Applications that run Simulink models on telemetry to produce new parameters. See Enrich.
VPS (Virtual Parameter Service): A service that calculates FDL virtual parameters centrally in an Open Streaming set-up.

W#

Workbook: Your saved workspace (.wbkx): pages, displays, layout and properties. Does not contain the session data. See Workbooks and pages.