NOAA PSL OttDisdrometerRaw KettlePonds for SLASH

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 Raw Output Files  

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Filenaming convention:  sssYYJJJHH_raw.txt

                       sss = three-letter site ID

                       YY  = two-digit year (UTC)

                       JJJ = three-digit day of the year (UTC)

                       HH  = two-digit hour (UTC)

Line 1

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MM/DD/YY OTT Parsivel (SN: SSSSSSS)

MM      = two-digit month (UTC)

DD      = two-digit day   (UTC)

YY      = two-digit year  (UTC)

SSSSSSS = serial number

Line 2 ... n

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 Field 1:  MMSSmmm

           MM = minute, SS = second, and mmm = millisecond at the time  

           the sample was acquired from the serial port (in UTC).

 Field 2:  RRRR.RRR

           Precipitation intensity; units: millimeter per hour

           This field corresponds to No. 01 on page 29 of the OTT manual.

 Field 3:  AA.AA

           Accumulated precipitation since last raw sample; units: millimeter

           This field corresponds to No. 02 on page 29 of the OTT manual.

 Field 4:  ZZ.ZZZ

           Radar reflectivity factor; units: decibel

           This field corresponds to No. 07 on page 29 of the OTT manual.

 Field 5:  NNNNN

           Number of detected particles since the last raw sample

           This field corresponds to No. 11 on page 29 of the OTT manual.

 Field 6:  S

           Sensor status.

           0 = Sensor working correctly

           1 = Laser protective glass is dirty, but measurements are still possible.

           2 = Laser protective glass is dirty, partially covered. No further usable measurements are possible.

           3 = Laser damaged.

           This field corresponds to No. 18 on page 29 of the OTT manual.

 Field 7:  EEE

           Error Code. 0 = no errors.

           This field corresponds to No. 25 on page 29 of the OTT manual.

 Field 8 - 39:    N.NNN,

                  N(d); units: per meter cubed millimeter

                  NOTE:  Missing data values are format filled with -9's.

                  These fields correspond to No. 90 on page 29 of the OTT manual.

 Field 40 - 71:   V.VVV,

                  v(d); unitless

                  These field correspond to No. 91 on page 29 of the OTT manual.

 Field 72 - 1095: P,

                  Number of particles detected for each particle-diameter/velocity

                  combination (32 x 32 matrix).  The 32 particle-diameter blocks

                  are listed from left to right for each incremental velocity class.

                  These fields correspond to No. 93 on page 29 of the OTT manual.

                  For example, Velocity1-PartDiam1...Velocity1-PartDiam32

                               Velocity2-PartDiam1...Velocity2-PartDiam32

                               ...

                               Velocity32-PartDiam1...Velocity32-PartDiam32

                  The particle diameters and velocities are as follows:

                  BIN   PartDiam(mm)    BIN   Velocity(m/s)

                  B1       0.062         B1       0.05

                  B2       0.187         B2       0.15

                  B3       0.312         B3       0.25

                  B4       0.437         B4       0.35

                  B5       0.562         B5       0.45

                  B6       0.687         B6       0.55

                  B7       0.812         B7       0.65

                  B8       0.937         B8       0.75

                  B9       1.062         B9       0.85

                  B10      1.187         B10      0.95

                  B11      1.375         B11      1.10

                  B12      1.625         B12      1.30

                  B13      1.875         B13      1.50

                  B14      2.125         B14      1.70

                  B15      2.375         B15      1.90

                  B16      2.750         B16      2.20

                  B17      3.250         B17      2.60

                  B18      3.750         B18      3.00

                  B19      4.250         B19      3.40

                  B20      4.750         B20      3.80

                  B21      5.500         B21      4.40

                  B22      6.500         B22      5.80

                  B23      7.500         B23      6.00

                  B24      8.500         B24      6.80

                  B25      9.500         B25      7.60

                  B26     11.000         B26      8.80

                  B27     13.000         B27     10.40

                  B28     15.000         B28     12.00

                  B29     17.000         B29     13.60

                  B30     19.000         B30     15.20

                  B31     21.500         B31     17.60

                  B32     24.500         B32     20.80

 NOTE: Raw data samples are only written to file when at least one particle is detected.

       All other missing data values are format filled with -9's.

The OTT manual can be accessed here:

https://psl.noaa.gov/data/obs/instruments/OpticalDisdrometerV2.pdf