def convert_time(newtime, lasttime):
"""
timeout=convert_time(newtime, lasttime)
converts the timestring given in newtime to a time in GPSseconds, return as timeout
lasttime is the last time return, used for increments
formats for newtime::
++dt - increments lasttime by dt seconds
yyyy-mm-dd,hh:mm:ss - UT date/time
t - GPS seconds
:param newtime: new time to parse
:param lasttime: previous time passed, used for parsing increments
:return: GPStime
"""
timeout=0
if not isinstance(newtime,str):
return newtime
if (newtime.startswith('++')):
try:
dt_string=newtime.replace('++','')
if (dt_string.count('s')):
# seconds
dt=int(dt_string.replace('s',''))
elif (dt_string.count('m')):
# minutes
dt=int(60*float(dt_string.replace('m','')))
elif (dt_string.count('h')):
# hours
dt=int(3600*float(dt_string.replace('h','')))
else:
# assume seconds
dt=int(dt_string)
except ValueError:
logging.warn('Unable to interpret time increment: %s' % newtime)
return timeout
timeout=ephem_utils.GPSseconds_next(lasttime+dt-8)
elif (newtime.count(':')>0):
try:
[date,tm]=newtime.split(',')
[yr,mn,dy]=date.split('-')
UT=ephem_utils.sexstring2dec(tm)
MJD=ephem_utils.cal_mjd(int(yr),int(mn),int(dy))
timeout=ephem_utils.GPSseconds_next(ephem_utils.calcGPSseconds(MJD,UT)-8)
except:
logging.warn('Unable to interpret timestamp: %s' % newtime)
return timeout
else:
try:
timeout=ephem_utils.GPSseconds_next(int(newtime)-8)
except ValueError:
logging.warn('Unable to interpret GPStime: %s' % newtime)
return timeout
return timeout
def daystr2gps(daystr):
"""
gpstime=daystr2gps(daystr)
returns the gpstime associated with a daystring YYYYMMDDhhmmss
"""
yr = int(daystr[0:4])
mn = int(daystr[4:6])
dy = int(daystr[6:8])
hour = int(daystr[8:10])
min = int(daystr[10:12])
sec = int(daystr[12:14])
UT = float(hour) + float(min) / 60.0 + float(sec) / 3600.0
MJD = ephem_utils.cal_mjd(yr, mn, dy)
gps = ephem_utils.calcGPSseconds(MJD, UT)
return gps