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iii.
SQM Frequency (Hz) –
the frequency produced by the sensor. Bright skies
produce a frequency up to 500 kHz. Dark skies produce a frequency as low as 4
Hz.
iv.
Sky (Volts)
– the voltage reported by the sensor. This value is used to calculate the
displayed Sky LUX.
v.
SQM NELM
– the “naked eye limiting magnitude”. This measurement is subject
to the seeing abilities of the individual person observing the sky. But, for an
average person with 20/20 vision, this indicates the faintest magnitude stars visible
to the naked eye. For example, an NELM of 6 indicates a person could see
magnitude 6 stars, but not fainter magnitude 7 stars.
vi.
SQM Irradiance
– the radiant flux as measured in µWatts per square centimeter.
vii.
Approx Stars Visible to Naked Eye and Atmospherics
– a “forecast” for how
good the night skies are and how many stars may be visible.
viii.
Sky Imaging Conditions
– a “forecast” for the Seeing. Typically, good seeing
produces limited star movement or scintillation from high altitude wind, clouds or
moisture.
e.
GPS Sensor Data
– if equipped with a GPS, this section reports the data from the GPS
sensor.
i.
Longitude
– your longitude in degrees. If no GPS is connected, it will report “0”.
ii.
Latitude
– your latitude in degrees. If no GPS is connected, it will report “0”.
iii.
Date
– the current date as reported by the GPS. If no GPS is connected, it will
01/01/2018.
iv.
Time
– the current time as reported by the GPS. If no GPS is connected, it will
report 00:00:00.
v.
Satellites
– the number of GPS satellites currently in view and connected with the
outdoor unit GPS sensor.
vi.
Altitude (m)
– the current altitude in meters as reported by the GPS sensor.
vii.
GPS fix
– an indicator that the GPS sensor has connected with enough satellites to
get an accurate reading of the current latitude and longitude.
viii.
NEMA Output
– a toggle to enable or disable NEMA data stream output from the
GPS sensor to be used by other computers or software.
ix.
7.
A video with additional information is available at:
smart.com/index.php?p=1_49_Video-Overviews
