One week of HESSI data have been simulated by Jim McTiernan to test HESSI data analysis procedures. These data are stored as FITS files and are on line in three primary archive locations - SSL, GSFC, and MSSL.
By default, the HESSI data analysis software simulates HESSI data using a default 2-source model and then analyzes the data. To read the files of simulated data instead, you must use keyword arguments to specify a time interval or file name, and you must have access to the files from your computer.
Access to the files can be accomplished either by mounting (or sharing)
the data directories from a local file server, or copying the files to
your own computer. (In the future, the software will automatically search
for data first on your own computer, then on a local archive, and then
on one of the primary archives.) In either case, you must define environment
variables to point to the location of the data (see below).
If your computer is on the same local network as one of the primary
archives, you can probably mount or share the archive without copying files.
See the examples below for the names of the archives at each primary archive
site.
If your computer is not on the same local network as one of the
primary archives, you must manually (for now) copy the files to your computer.
You can do this through a browser or through an FTP program.
Warning: If an error is found in the files of simulated data,
the files may be regenerated. In this case, you will need to copy
a new set of files.
| Browser | Enter one of the following URL's depending on your geographic location:
http://hessi.ssl.berkeley.edu/data/test_data ftp://hesperia.gsfc.nasa.gov/hessidoc/test_data ftp://surfwww.mssl.ucl.ac.uk/hessi/test_data/ This allows you to download any file by just clicking on the file name. You can only copy one file at a time. |
||||||||
| FTP | Connect using anonymous ftp to one of the following sites and change
directory to the directory shown:
The transfer mode should be binary. |
Files of Interest
Minimum set of files needed:
Store these files wherever you like on your computer.
The following environment variables need to be set to points to
the location of the data files. (Currently all of them should point to
the same directory. This will change in the future.
There are a number of ways to set environment variables in SSW.
Three methods are shown below in order of preference. Any one of them will
set the environment variable HSI_DATA_ARCHIVE. In the methods, 'full_data_path_name'
should be replaced by the full path name of the data location. The
syntax of the command is the same for UNIX and Windows, while the syntax
of 'full_data_path_name' depends on the OS.
| Method 1. | If you haven't done so already, copy the setup.hessi_env file from
the $SSW/hessi/setup directory to the $SSW/site/setup directory (where
$SSW means the root of the ssw tree on UNIX or Windows), and add the following
line to the file:
setenv (On UNIX, you could copy the setup.hessi_env to your home directory
instead of the site setup directory. Also, on UNIX, to make the change
take effect, you must re-run setup.ssw, via
|
| Method 2. | Add the following line to your idl_startup file:
|
| Method 3. | After entering IDL, type at the IDL prompt:
|
Note: Method 1 should have no quotes, equal signs, or commas in the command, and Methods 2 and 3 require commas and quotes on both the second and third fields.
| GSFC UNIX | The archive is on hesperia.gsfc.nasa.gov/export/data1 which can be
NFS-mounted on your computer. The mount point name on your computer is
arbitrary. If the mount point is /hessi/data, then the required setup.hessi_env
line is
|
| GSFC Windows | The archive is shared from hesperia as \\hesperia.gsfc.nasa.gov\hessi\data1\test_data.
You should be able to get to this directory from Network Neighborhood.
The required setup.hessi_env line is
|
| SSL UNIX | The archive is on soleil which is already NFS-mounted on the cluster
of Sun's, so the mount point is the same on all of the Sun's in the cluster.
The required setup.hessi_env line is
|
| SSL Windows | If you have NFS-client software on your PC (e.g. Maestro), the archive
on soleil can be NFS-mounted on your PC. The network path to connect
is \\soleil\mydisks\disk1\data. If you connected soleil as
drive h: then the required setup.hessi_env line is
|
| Anywhere Windows | If you have a copy of the data files on your PC (e.g. in c:\hessi\data),
then the required setup.hessi_env line is
|
Last Modified: Feb 27, 2001