Files with 'optica' in the title contain data from the dewpoint hygrometer. Column titles are:
date	time	stage_temperature(degrees c)	dewpoint(degrees c)
A calibration is applied to the temperature as follows:
calibrated_stage_temperature=0.997299296*stage_temperature+0.0601994783
RH is then calculated according to Murphy and Koop (2005).
Optica files for each RH are as follows:
40 20140915_optica_1
50 20140701_optica_1
60 20140609_optica_1
70 20140526_optica_1
80 20140604_optica_1

Spectral data are contained in files with 'line' in the title. Column titles are:
y_coordinate(um)	x_coordinate(um)	wavenumber(cm-1)	intensity(arbitrary units)

Data collected at 40% RH are contained in these files (time in seconds since start of experiment):
Contents of RH_40.zip
20140915_line_1 (time=568.00)
20140915_line_2 (time=1971.00)
20140916_line_1 (time=76263.00)
20140917_line_1 (time=167559.00)
20140918_line_1 (time=258801.00)
20140919_line_1 (time=331426.00)
20140923_line_1 (time=686884.00)
20140930_line_1 (time=1283007.00)
20141001_line_1 (time=1367364.00)
20141003_line_2 (time=1537064.00)
20141006_line_1 (time=1807953.00)
20141007_line_1 (time=1886460.00)
20141010_line_1 (time=2150260.00)
20141013_line_1 (time=2415815.00)
20141014_line_1 (time=2487566.00)
20141015_line_1 (time=2578030.00)
20141017_line_1 (time=2755281.00)

Data collected at 50% RH are contained in these files (time in seconds since start of experiment):
Contents of RH_50.zip
20140701_line_2 (time=2914.00)
20140702_line_1 (time=86637.00)
20140703_line_1 (time=178548.00)
20140704_line_1 (time=253515.00)
20140707_line_1 (time=507538.00)
20140707_line_2 (time=518284.00)
20140708_line_1 (time=592537.00)
20140709_line_1 (time=679528.00)
20140709_line_2 (time=697819.00)
20140710_line_1 (time=775095.00)
20140710_line_2 (time=783331.00)
20140711_line_1 (time=850752.00)
20140711_line_2 (time=862148.00)
20140717_line_1 (time=1382430.00)
20140717_line_2 (time=1391084.00)
20140718_line_1 (time=1468105.00)
20140718_line_2 (time=1476406.00)
20140719_line_1 (time=1558322.00)
20140720_line_1 (time=1647943.00)
20140720_line_2 (time=1651915.00)
20140721_line_1 (time=1720250.00)
20140722_line_1 (time=1814952.00)
20140723_line_1 (time=1900594.00)
20140724_line_1 (time=1986194.00)
20140728_line_1 (time=2345360.00)
20140729_line_1 (time=2405594.00)
20140730_line_1 (time=2492560.00)

Data collected at 60% RH are contained in these files (time in seconds since start of experiment):
Contents of RH_60.zip
20140609_line_1 (time=3594.00)
20140609_line_2 (time=14867.00)
20140609_line_3 (time=15295.00)
20140609_line_4 (time=23326.00)
20140610_line_1 (time=76519.00)
20140610_line_2 (time=91282.00)
20140610_line_3 (time=97278.00)
20140611_line_1 (time=168037.00)
20140611_line_2 (time=169273.00)
20140611_line_3 (time=174666.00)
20140611_line_4 (time=185522.00)
20140611_line_5 (time=280121.00)
20140612_line_1 (time=251816.00)
20140612_line_2 (time=260149.00)
20140612_line_3 (time=267426.00)
20140613_line_1 (time=342685.00)
20140613_line_2 (time=350400.00)
20140616_line_1 (time=598395.00)
20140616_line_2 (time=608961.00)
20140616_line_4 (time=617255.00)
20140617_line_1 (time=682470.00)
20140617_line_2 (time=691414.00)
20140617_line_3 (time=701623.00)

Data collected at 70% RH are contained in these files (time in seconds since start of experiment):
Contents of RH_70.zip
20140526_line_1 (time=1447.00)
20140526_line_2 (time=8202.00)
20140526_line_3 (time=21002.00)
20140526_line_4 (time=21562.00)
20140527_line_1 (time=81134.00)
20140527_line_2 (time=82835.00)
20140528_line_1 (time=181828.00)
20140529_line_1 (time=254375.00)
20140529_line_2 (time=266700.00)

Data collected at 80% RH are contained in these files (time in seconds since start of experiment):
Contents of RH_80.zip
20140604_line_1 (time=1266.00)
20140604_line_2 (time=13854.00)
20140604_line_3 (time=14907.00)
20140604_line_4 (time=17391.00)
20140604_line_5 (time=21599.00)
20140604_line_6 (time=24620.00)
20140604_line_7 (time=28077.00)
20140604_line_8 (time=31975.00)
20140605_line_2 (time=94313.00)
20140605_line_3 (time=95092.00)
20140605_line_4 (time=99122.00)
20140605_line_5 (time=102653.00)
20140605_line_6 (time=105725.00)
20140605_line_7 (time=113478.00)
20140605_line_8 (time=119277.00)