PURPOSE --
Creates a local copy of the TUT file available on the web.
 
DEVELOPER --
Alan Patterson
 
MODIFICATION HISTORY --
Initial implementation              app 05/08/03
Modified to spoof user-agent        dc  08/07/03
rename                              dc  10/13/03
use urillib3 or urllib2 based on
the python version                  dc  11/04/03
Update default output file name     app 01/19/04
remove urllib3                      dc   9/21/04
new location for tut file           app 03/03/05
add verbose, update for OBS         app 12/05/06
make services case insensitive      app 05/23/07
option to access published TUT      app 09/05/07
add TDS, 171 and 275 to default list  app 06/27/08
ensure ssh usage                      app 05/07/09
update for SNAS website (SWSI going away)   app 10/14/10
update for use outside of SOGS       drc 03/24/11
update to get TDRS from tdrsuse file via ephem_util drc 11/25/14
replace yoda and palpatine with tugger and dunwell drc 1/7/16

Modules
		os socket spss_sys_util spst_getopt string sys time_util urllib2

Functions
		run(*args) Get the TUT file from its website   do get_web_tut [-tdrs=<tdrs_list>] [-services=<services_list>]                [-start=<start_time>] [-end=<end_time>]                [-outfile=<outfilename>] [-get] [-verbose]                [-published] [-machine=<node>]               where  -tdrs=tde,tdw,..    indicates which TDRS satellites                                        to limit the request to.                                        (TDE,TDW,171,275, etc.)                    -services=mar,sa    indicates which services to limit                                        the request to.                                        (MAR,MAF,SA,SMAR,SMAF)                    -start=<start_time> indicates the start of the time                                        window for which to report events                    -end=<end_time>     indicates the end of the time                                        window for which to report events                    -outfile=<tut_file_name> specifies the output file                                        name. It defaults to tut_yyyy_mmdd_HHMM.tmp                    -get                request data from the web rather than                                        printing documentation (which would be                                        the default action with no args)                    -verbose            provides informational messages                                        during execution                    -published          retrieve published (full) TUT file                                        Options start, end, tdrs and services                                        will be ignored                    -machine=<node>     Indicate machine to execute the web                                        request from.  Default is current node,                                        or holst if the current node is not in                                        the acceptable NODELIST

Data
		NODELIST = ['holst.sogs.stsci.edu'] NODES = ['holst.sogs.stsci.edu'] NOMINAL_TDRS_COMBO = ('TDS', 'TDW', 'TDE', '171') OBSNODES = ('scarlatti.ccs.hst.nasa.gov', 'corelli.ccs.hst.nasa.gov') PASS_SYSTEM = 'ops' TDRS_LIST = ('171', '150', 'TDS', '046', 'TDW', '041', '174', '220', '275', 'TDE') TESTNODES = ['tugger.stsci.edu', 'dunwell.stsci.edu'] __author__ = 'Alan Patterson' __version__ = '16.01.07'

Author
		Alan Patterson