Peak-normalized spectral response data (.SPN file) for MFRSR. 


File header information and notes. 

For the peak-normalized spectral response file ( *.SPN), here are

the column titles:

                                      | -------- channel response, peak normalized  ------>
Wave-    Si monitor   Normalized    ch1      ch2      ch3      ch4      ch5      ch6      ch7     
length   photodiode   Si monitor    broad-
nm       output, A    rel to pk     band     415nm    500nm    615nm    673nm    870nm    938nm 


402.0   4.79E-0007   9.36E-0001     0.0000   0.0000   0.0000   0.0000   0.0000   0.0000   0.0000
403.0   4.81E-0007   9.27E-0001     0.0000   0.0000   0.0000   0.0000   0.0000   0.0000   0.0000
404.0   4.82E-0007   9.17E-0001     0.0000   0.0000   0.0000   0.0000   0.0000   0.0000   0.0000
405.0   4.88E-0007   9.17E-0001     0.0000   0.0356   0.0000   0.0000   0.0000   0.0000   0.0000
406.0   4.96E-0007   9.21E-0001     0.0000   0.0524   0.0000   0.0000   0.0000   0.0000   0.0000
407.0   4.98E-0007   9.13E-0001     0.0000   0.0617   0.0000   0.0000   0.0000   0.0000   0.0000
408.0   5.05E-0007   9.15E-0001     0.0000   0.0873   0.0000   0.0000   0.0000   0.0000   0.0000
409.0   5.15E-0007   9.23E-0001     0.0000   0.1247   0.0000   0.0000   0.0000   0.0000   0.0000
410.0   5.24E-0007   9.29E-0001     0.0000   0.2085   0.0000   0.0000   0.0000   0.0000   0.0000
411.0   5.29E-0007   9.27E-0001     0.0000   0.3764   0.0000   0.0000   0.0000   0.0000   0.0000
412.0   5.33E-0007   9.25E-0001     0.0000   0.6373   0.0000   0.0000   0.0000   0.0000   0.0000
413.0   5.43E-0007   9.32E-0001     0.0000   0.8787   0.0000   0.0000   0.0000   0.0000   0.0000
414.0   5.46E-0007   9.28E-0001     0.0000   0.9824   0.0000   0.0000   0.0000   0.0000   0.0000
415.0   5.42E-0007   9.12E-0001     0.0000   1.0000   0.0000   0.0000   0.0000   0.0000   0.0000
416.0   5.49E-0007   9.15E-0001     0.0000   0.9988   0.0000   0.0000   0.0000   0.0000   0.0000

-etc. -

Notes:

     1. Wavelength column is in ascending order, with breaks in the sequence (see #4).

     2. Typical slit width for MFRSR test is 1.5 to 1.8 nm.
        Typical slit width for UVMFR test is 0.21 to 0.3 nm.

     3. Broadband channel (ch#1) calibration is accomplished during a separate
        absolute calibration (FEL lamp) test. In that test, ch#1 output is
        compared to an Eppley PSP-calibrated SDR response, and the output
        coefficient reported. In this .SPN file the ch#1 data are not
        valid since the SNR is insufficient, considering the monochromator's 
        small optical signal compared to the sun. But this column is included 
        for completeness as well as a system QC check.

     4. Once the scan is complete the monochromator moves backwards, stopping 
        every 100 nm to make one measurement. This parks the gears so as to
        reduce backlash effects.

     5. Outside the "skirts" of the filter, below a 3% signal response relative 
        to the normalized peak of 1.0. For example on a 940 nm channel typically
        below 929 nm and above 948 nm the signal is beyond our ability to resolve it.  
        This is the noise floor of the combined detector and the automatic test system in 
        our cal lab. While it might be interesting to extend beyond the 3% level we do not 
        have sufficient signal-to-noise ratio to do so. This is mainly because the filter
        radiometer's gain is optimized for outdoor sunlight exposure where there is
        a large optical signal. In our cal lab there is effectively much less optical
        signal energy available through the output of the monochromator which is 
        illuminated with a 150 watt Xenon arc lamp. So there is unfortunately no data outside this
        window, but the filter is blocking past this point. A simple test of the out of
        band blocking is to use a commonly available WG glass cutoff filter such a WG325,
        available from manufacturers such as Oriel corp.

Thank you,

Yankee Environmental Systems, Inc.
email: info@yesinc.com