View Contents of a LOSC HDF5 file

Option 1: Use HDFView

A helpful, free software for viewing the structure of an HDF5 file is the HDFView tool, which can be downloaded from the HDF Group web site. This will give you an interactive display of a LOSC data file.

Option 2: Use a short Python script

Alternatively, you can write a short python script for viewing the structure of a LOSC data file like this:
import h5py

def dump_info(name, obj):
    print "{0} :".format(name)
    try:
        print "   .value: {0}".format(obj.value)
	for key in obj.attrs.keys():
            print "     .attrs[{0}]:  {1}".format(key, obj.attrs[key])
    except:
	pass

filename = 'H-H1_LOSC_4_V1-842711040-4096.hdf5'
file = h5py.File(filename)
file.visititems(dump_info)
    
This will present output like this:
meta :
meta/Description :
   .value: Strain data time series from LIGO
meta/DescriptionURL :
   .value: http://losc.ligo.org/
meta/Detector :
   .value: H1
meta/Duration :
   .value: 4096
meta/GPSstart :
   .value: 842711040
meta/Observatory :
   .value: H
meta/Type :
   .value: StrainTimeSeries
meta/UTCstart :
   .value: 2006-09-19T14:23:46
quality :
quality/detail :
quality/injections :
quality/injections/InjDescriptions :
   .value: ['PEM injection' 'Hardware injection active'
 'CBC hardware injection active' 'Burst hardware injection active'
 'Stochastic group injection active' 'CW injection active']
quality/injections/InjShortnames :
   .value: ['PEM' 'HW' 'HW_CBC' 'HW_BURST' 'HW_STOCH' 'CW']
quality/injections/Injmask :
   .value: [0 0 0 ..., 0 0 0]
     .attrs[Bits]:  6
     .attrs[Description]:  A bitmask encoded as an integer-valued timeseries.
      The first "Bits" bits might be used, for each there is an entry in "Bits", "Shortnames", "Descriptions", one for each bit.
     .attrs[Npoints]:  4096
     .attrs[Xunits]:  second
     .attrs[Xlabel]:  GPS time
     .attrs[Xstart]:  842711040
     .attrs[Xspacing]:  1.0
     .attrs[Ylabel]:  Injmask
quality/simple :
quality/simple/DQDescriptions :
   .value: ['Science data present' 'Category-1 checks passed for CBC high-mass search'
 'Category-2 and 1 checks passed for CBC high-mass search'
 'Category-3 and 2 and 1 checks passed for CBC high-mass search'
 'Category-4,3,2,1 checks passed for CBC high-mass search'
 'Category-1 checks passed for CBC low-mass search'
 'Category-2 and 1 checks passed for CBC low-mass search'
 'Category-3 and 2 and 1 checks passed for CBC low-mass search'
 'Category-4, veto active for CBC low-mass search'
 'Category-1 checks passed for burst search'
 'Category-2 and 1 checks passed for burst search'
 'Category-3 and 2 and 1 checks passed for burst search'
 'Category-2E and 1 subsecond-event checks passed for burst search'
 'Category-3E, 2E, 1 subsecond-event checks passed for burst search'
 'Category-1 checks passed for continuous-wave search'
 'Category-1 checks passed for stochastic search'
 'Category-2 and 1 checks passed for stochastic search, H1-L1 combination'
 'Category-2 and 1 checks passed for stochastic search, H2-L1 combination']
quality/simple/DQShortnames :
   .value: ['DATA' 'CBCHIGH_CAT1' 'CBCHIGH_CAT2' 'CBCHIGH_CAT3' 'CBCHIGH_CAT4'
 'CBCLOW_CAT1' 'CBCLOW_CAT2' 'CBCLOW_CAT3' 'CBCLOW_CAT4' 'BURST_CAT1'
 'BURST_CAT2' 'BURST_CAT3' 'BURST_CAT2E' 'BURST_CAT3E' 'CW_CAT1'
 'STOCH_CAT1' 'STOCH_CAT2_H1L1' 'STOCH_CAT2_H2L1']
quality/simple/DQmask :
   .value: [65535 65535 65535 ...,     0     0     0]
     .attrs[Bits]:  18
     .attrs[Description]:  A bitmask encoded as an integer-valued timeseries. The first "Bits"
      bits might be used, for each there is an entry in "Bits", "Shortnames", "Descriptions", one for each bit.
     .attrs[Npoints]:  4096
     .attrs[Xunits]:  second
     .attrs[Xlabel]:  GPS time
     .attrs[Xstart]:  842711040
     .attrs[Xspacing]:  1.0
     .attrs[Ylabel]:  DQmask
strain :
strain/Strain :
   .value: [  1.07601499e-16   1.06790256e-16   1.05878874e-16 ...,              nan
              nan              nan]
     .attrs[Npoints]:  16777216
     .attrs[Xunits]:  second
     .attrs[Xlabel]:  GPS time
     .attrs[Xspacing]:  0.000244140625
     .attrs[Xstart]:  842711040
     .attrs[Yunits]:  
     .attrs[Ylabel]:  Strain