
Appendix B Real-Time Analysis
Real-Time Analysis Overview
Real-Time Analysis is a software that runs on the instrument computer, extracts intensities from images to
perform base calling, and then assigns a quality score to the base call.
The MiniSeq System uses an implementation of Real-Time Analysis called RTA2. The system control software
and RTA2 communicate through a web HTTP interface and shared memory files. If RTA2 is terminated,
processing does not resume and run data are not saved.
Input and Output Files
Input Files
Real-Time Analysis software requires the following input for processing:
u
Tile images contained in local system memory.
u
RunInfo.xml, which is generated automatically at the beginning of the run and provides the run name,
number of cycles, whether a read is indexed, and the number of tiles on the flow cell.
Real-Time Analysis software receives commands from the control software about the location of RunInfo.xml
and whether an optional output folder is specified.
Output Files
Images for each channel are passed in memory as tiles. Tiles are small imaging areas on the flow cell defined
as the field of view by the camera. From these images, the software produces output as a set of quality-
scored base call files and filter files. Output files are used for downstream analysis on BaseSpace or by Local
Run Manager analysis modules.
File Type
Description
Base call files
Each tile that is analyzed is included in an aggregated base call (*.bcl) file for each lane
and for each cycle. The aggregated base call file contains the base call and associated
quality score for every cluster in that lane.
Filter files
Each tile produces filter information that is aggregated into 1 filter (*.filter) file for each
lane. The filter file specifies whether a cluster passes filters.
Cluster location files
Cluster location (*.locs) files contain the X,Y coordinates for every cluster in a tile. A
cluster location file is generated for each lane during template generation.
Base call index files
A base call index (*.bci) file is produced for each lane to preserve the original tile
information. The index file contains a pair of values for each tile, which are tile number
and number of clusters for that tile.
RTA2 provides real-time metrics of run quality stored as InterOp files. InterOp files are a binary output
containing tile, cycle, and read-level metrics, and are used to view real-time metrics using the Sequencing
Analysis Viewer software.
Document # 1000000002695 v02 Material # 20014309
For Research Use Only. Not for use in diagnostic procedures.
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