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What Exactly Does XM Weather Show Us?

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Key Takeaways:

  • WxWorx employs a highly redundant system with multiple collection points and delivery methods to ensure rapid and reliable transmission of weather data to cockpits, typically within 30 seconds.
  • The system uses proprietary algorithms to process Nexrad radar data, creating "composite reflectivity" images every five minutes by combining the most recent and intense information from all radar elevation scans, prioritizing safety by potentially "overstating" negative conditions.
  • Despite rapid delivery, the weather products (including Nexrad and satellite images with inherent latency) are designed for "situational awareness" and not as "tactical tools," requiring pilots to adhere to traditional safety margins around hazardous weather.
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WxWorx on Wings, the weather products that XM Satellite Weather downlinks from satellites to our cockpits, is provided to XM by Baron Services’ WxWorx. The weather products are collected at two distinct collection points, one located at WxWorx’s headquarters in Huntsville, Alabama, and the other inside the National Climatic Data Center (NCDC) in Asheville, North Carolina. The two collection points are part of the redundancy that WxWorx has carefully built into its system.

Continuing the effort at redundancy, the weather data is delivered by both satellite and high speed internet to the collection centers. “In most cases,” explained Bob Baron, founder, CEO and president of Baron Services, “we have double redundancy.” As soon as WxWorx receives the information the data stream is automatically sent to XM over a dedicated line and two internet connections. Again, the object is to have no single point of failure. The transmission goes to XM Satellite Weather’s operation center and is inserted into its uplink to both of its satellites and broadcast over all its relay stations on the surface of the earth.

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