Once the PTI user has obtained his/her Level 1 data for science
targets and corresponding calibrators, the programs wbCalib and nbCalib take these files as
input in order to produce fully calibrated data (Level 2 files). At this time,
PTI users must calibrate their own data, a task that is greatly
simplified if making use of our calibration packages, which may be
obtained from our software
download page or using the web interface. A guide to calibrating PTI data using these
programs is available here.
Data access
The Level 1 data are available through a web interface which
accesses all the desired Level 1 data from a database. The database
allows selection
of data across many nights, and using a variety of selection criteria.
For instance, all data with a given project
ID, or a for a given target, or for a range of dates, can be retrieved
in one query. The interface allows exporting your L1
data in ASCII or FITS formats.
Public users have access to PTI data once the proprietary period
has expired by self-registering for an account to our web access
tool.
Interferometer modes
Although PTI operates in several modes, only visibility amplitude (also
called V2<\sup> or NIRV2) data
are publicly available.
Formats for L1 and L2 files
The PTI Level 1 and Level 2 data are available in
both FITS and ASCII formats. The following links detail the file
format in each case:
Quality Assessment
As part of the Level 1 file set, we include information which
characterizes the data quality at different levels. For details, please
consult the QA description page.
Data rights
The default data proprietary period is 18 months.
Return to PTI Support page
last updated Jan 5, 2006