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This Knowledge Base article summarizes frequently asked questions about Skylark. What is Skylark? Skylark ™  is a cloud-based, high-precision GNSS data corrections service. Skylark delivers simple, fast positioning over the Internet for mass market automotive and autonomous vehicles. Swift Navigation is known for affordable, high-accuracy receivers, why develop a cloud corrections service? Skylark completes Swift’s end-to-end product offering by adding a cloud corrections service to its line of GNSS receivers. Unlike other corrections services that require radio antennas or are tethered to individual base stations, Skylark operates like a utility. Swift customers simply connect their device to power and the Internet or cellular data to get real-time positioning corrections for highly-dynamic GNSS applications, like self-driving cars. How does Skylark fit into Swift’s goal of making GNSS affordable? Skylark supports Swift’s vision of democratizing accessible, low-cost, high-precision GNSS. Not only are Swift receivers some of the lowest-cost, high-precision devices on the market, but Skylark is priced very affordably at just $50/device per month or $495/device per year, with a free 30-day trial. Is there a minimum/ maximum number of receivers that I need to have to sign up for Skylark? No. From one to an unlimited number of units, Skylark has been designed for massive scale. Where is the Skylark service available? Skylark is currently available to preview in six major metropolitan markets, all hotbeds of autonomous driving innovation: San Francisco Bay Area, CA Los Angeles, CA San Diego, CA Phoenix, AZ Pittsburgh, PA Detroit, MI         Plans for expansion include a scalable GNSS network to provide observations for the correction service, starting with phase 1 = contiguous U.S. and phase 2 = global expansion. If an area is not covered by the Skylark Network today, how do I request coverage or receive notification of when an area of interest is covered? On the Swift website at https://www.swiftnav.com/skylark  - customers can query existing coverage, submit a coverage request and sign up for coverage updates. Will my receiver still connect to Skylark outside of the service coverage region? The zip code search and coverage map may vary from the true coverage footprint observed on the ground. The device will maintain a connection to Skylark nearby the coverage boundary but the correction quality outside of the advertised coverage is undefined. When no connection is available, the receiver will continue to operate normally without the corrections provided by the Skylark service. Does Skylark work with non-Swift devices? Today, Skylark is compatible with Piksi® Multi and Duro® GNSS receivers. Skylark does not support third-party GNSS receivers at launch. Swift welcomes customer feedback about use cases and GNSS device support desired for the service. Do my receivers require network connectivity to utilize the Skylark service? Yes. A GNSS receiver must be able to connect to the Internet to communicate with Skylark and pass data corrections. Why are GNSS corrections from Skylark important for precise localization? Corrections are vitally important in a high-precision GNSS location system as satellite orbits vary, satellite clocks drift, satellite signals take long paths through the ionosphere and troposphere where radiation from the sun and weather patterns above Earth’s atmosphere all degrade satellite signals. As the signals get closer to Earth, there are additional multipath reflections from buildings and structures in real world environments that affect the precision of the position results being computed by the GNSS receiver. This can result in positions being incorrect by millimeters up to to multiple meters, if not corrected. Skylark has been designed from the ground up to correct all of these satellite signal degradations, so Piksi Multi and Duro GNSS receivers can obtain centimeter-level accuracy with high reliability.   When should I use the Skylark Cloud Correction Service? The cloud corrections service is the easiest way to enable a Piksi Multi and Duro receiver to produce high-precision positioning output within the Skylark coverage area.     www.swiftnav.com  | support@swiftnav.com     ©2018 Swift Navigation, Inc. All rights reserved  |  Version 2.0 | Swift Navigation, Inc. Proprietary