SCAA Stand-Alone ASOS/AWOS
Perfect for Aviation Applications
A single cabinet connected to sensors and external data sources
weather applications water applications energy applications gas flux and turbulence applications infrastructure applications soil applications

Overview

The Stand-Alone ASOS/AWOS, or SCAA, is a data collection package consisting of power distribution and control circuitry, as well as data collection and dissemination circuitry. The system is housed in an aluminum, powder-coated enclosure. Typically, the SCAA consists of a single cabinet connected to sensors and external data sources. A single data collection platform (DCP) may also be used with the SCAA. 

The SCAA continuously gathers and processes raw data from the adjacent sensors (e.g., voltages, extinction coefficients, data counts) and may condition these data. Data conditioning may include such processes as sampling, formatting, and scaling. 

For information on how the National Weather Service (NWS) uses Campbell Scientific Automated Surface Observing System (ASOS) solutions, visit https://www.weather.gov/asos/CurrentEvents.html.

Benefits and Features

  • Able to acquire data from up to 15 directly connected sensors
  • AeroX™Audio 105 Audio Controller included for digital voice file transmission over ATIS, dial-up voice modem, GTA radio integration, or ATC handset
  • System diagnostics visibility through CampbellAero™ Automated Weather Observing System (AWOS) software's user interface
  • Hot standby redundant embedded controllers with auto failover capability to increase system uptime
  • Simplified replacement via configuration files moving from backup controller to replacement controller
  • Redundant 24 Vdc power supplying two serial servers
  • CR1000X Measurement and Control Datalogger included for sensor integration and system diagnostics
  • FIPS-compliant access point for TCP/IP communications
  • 2,000 W UPS for battery backup power

Images

Specifications

Operating Temperature Range -60° to +120°F
Operating Humidity Range 0 to 100% RH
Wind Loading Up to 231.75 km/h (144 mph)
IP Rating IP66
Solar Insolation Rating 90 W/ft2 at 120°F
Pressure Rating Up to 15.7 inHg

Mechanical
Single Cabinet Design
  • SLEP 1.0 enclosure dimensions
  • Drop-in replacement cabinet for legacy SCAs
Internal Mounting Arrangements
  • DIN rail mounting for system components
  • Keyed hole panel mounting
  • 48.26 cm (19 in.) rack mounting
Hot Standby Redundant Controllers
  • Auto failover
  • Auto configuration file transfer
Serial Servers
  • Server 1: RS-232 only
  • Server 2: RS-232, RS-422, RS-485
Provided by the CR1000X Datalogger SDM-SI02R modules
TCP/IP Communications
  • FIPS-compliant switching
  • Embedded controllers
  • Technician interface
  • Future communications compatible (LTE, satellite)
Provided by the AeroX Audio 105
  • ATIS
  • Dial-up voice modem
  • GTA radio
  • ATC handset capability
HDLC Allows ACU to output HDLC for ADAS
Expansion Capability Sensor expansion modules
Critical Component Field Replacement
  • Power supplies
  • Data logger
  • Port servers
  • Embedded controllers
  • Radio
  • UPS
  • AeroX Audio 105
  • Ethernet switch

Electrical
Power
  • Monitored through CampbellAero AWOS software
  • 110 Vac mains power
  • Mains filtering
  • Overvoltage protection for power distribution
  • 48 Vdc battery array
  • 24 Vdc 20 A AC/DC power supplies
  • Redundancy for 24 Vdc power supply
Expansion Power Supply Option
  • 2,000 W UPS backup battery
  • Circuit breaker panel with power distribution terminal blocks
  • 12 Vdc power adapter
  • 5 Vdc power adapter

Electromagnetic Compatibility (EMC)
Immunity
  • IEC 61000-4-2 (ESD)
  • RS103 (Radiated RF Immunity)
  • IEC 61000-4-4 (EFT)
  • IEC 61000-4-5 (Surge)
  • IEC 61000-4-6 (Conducted RF Immunity)
  • IEC 61000-4-11 (Power Quality)
Radiated and Conducted Emissions 47 CFR Part 15

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