4
Outside Relative Humidity (sensor located in ISS)
Resolution and Units ................................................. 1%
Range ....................................................................... 1 to 100% RH
Accuracy ................................................................... ±3% (0 to 90% RH), ±4% (90 to 100% RH)
Temperature Coefficient ............................................ 0.03% per °F (0.05% per °C), reference 68°F (20°C)
Drift ........................................................................... ±0.5% per year
Update Interval.......................................................... 50 seconds to 1 minute
Current Data.............................................................. Instant (user adjustable) and Hourly Reading; Daily, Monthly, Yearly
High and Low
Historical Data........................................................... Hourly Readings; Daily, Monthly Highs and Lows
Alarms....................................................................... High and Low Threshold from Instant Reading
Moon Phase
Console Resolution........................................................... 1/8 (12.5%) of a lunar cycle, 1/4 (25%) of lighted face on console
WeatherLink Resolution .................................................... 0.09% of a lunar cycle, 0.18% of lighted face maximum (depends on
screen resolution)
Range............................................................................... New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full
Moon, Waning Gibbous, Last Quarter, Waning Crescent
Accuracy........................................................................... ±38 minutes
Rainfall
Resolution and Units......................................................... 0.01" or 0.2 mm (user-selectable) (1 mm at totals 2000 mm)
Range............................................................................... 0 to 199.99" (0 to 6553 mm)
Rain Rate ......................................................................... 0 to 40"/hr (0 to 1016 mm)
Accuracy........................................................................... Greater of 4% or 1 tip
Update Interval ................................................................. 20 to 24 seconds
Storm Determination Method............................................. 0.02" (0.5 mm) begins a storm event, 24 hours without further
accumulation ends a storm event
Current Data ..................................................................... Totals for Past 15-min, Past 24-hour, Daily, Monthly, Yearly (start
date user-selectable) and Storm (with begin date); Umbrella is
displayed when 15 minute total exceeds zero
Historical Data .................................................................. Totals for 15-min, Daily, Monthly, Yearly (start date user-selectable)
and Storm (with begin and end dates)
Alarms .............................................................................. High Threshold from Latest Flash Flood (15-min. total, default is
0.50", 12.7 mm), 24-hour Total, Storm Total,
Range for Rain Alarms...................................................... 0 to 99.99" (0 to 999.7 mm)
Rain Rate
Resolution and Units......................................................... 0.01" or 0.1 mm (user-selectable) at typical rates (see Fig. 3 and 4)
Range............................................................................... 0, 0.04"/hr (1 mm/hr) to 40"/hr (0 to 1016 mm/hr)
Accuracy........................................................................... ±5% when rate is under 5"/hr (127mm/hr)
Update Interval ................................................................. 20 to 24 seconds
Calculation Method ........................................................... Measures time between successive tips of rain collector. Elapsed
time greater than 15 minutes or only one tip of the rain collector
constitutes a rain rate of zero.
Current Data ..................................................................... Instant and Hourly, Daily, Monthly and Yearly High
Historical Data .................................................................. Hourly, Daily, Monthly and Yearly Highs
Alarm ................................................................................ High Threshold from Instant Reading
Solar Radiation (requires Vantage Pro2 ISS with solar radiation sensor)
Resolution and Units ......................................................... 1 W/m
2
Range............................................................................... 0 to 1800 W/m
2
Accuracy........................................................................... ±5% of full scale (Reference: Eppley PSP at 1000 W/m
2
)
Drift .................................................................................. up to ±2% per year
Cosine Response.............................................................. ±3% for angle of incidence from 0° to 75°
Temperature Coefficient.................................................... -0.067% per °F (-0.12% per °C); reference temperature = 77°F (25
°C)
Update Interval ................................................................. 50 seconds to 1 minute (5 minutes when dark)
Current Data ..................................................................... Instant Reading and Hourly Average; Daily, Monthly High
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