Skylark and Skylark RTK

Swift Navigation now offers two variants of our Skylark corrections service.

Skylark is the original Swift corrections service, providing consistent continent-wide accuracy. It offers corrections in a variety of formats: SSR (3.5 Kbps), Swift’s proprietary OSR (7.5 Kbps), and MSM4/MSM5 formats (5 Kbps). Skylark is the service for automotive and any other industries requiring consistent, continent-wide performance. The original Skylark is the only one that provides integrity information in the corrections stream.  It is also the only service that provides the option of digitally signing corrections to provide assurances to clients that the corrections have not been tampered with, and that they originated from Swift. Market segments that primarily use Skylark include (but are not limited to) automotive and vehicles for which the PE is predominately Starling.


Skylark RTK improves on the Skylark corrections accuracy and provides an uncombined integer fixed RTK solution to deliver centimeter-level accuracy. RTK utilizes the existing Skylark reference station network and operates in much the same way as a traditional network RTK solution. Skylark RTK supports most major brand GNSS RTK receivers including support for L1/L2 and L1/L5 frequencies, and both legacy RTCM 3.1 and MSM5 correction formats. Skylark RTK is ideal for customers who want an integer fixed RTK solution and the highest level of accuracy while operating in defined geographical areas. Market segments that primarily use RTK include (but not limited to) lawn mowers and slow moving robots where the PE is a mix of Starling and third parties.

Additional Resources

If you have additional questions, the Skylark/Skylark RTK FAQ may be a big help.

Otherwise, you can return to the Skylark RTK Article Directory for additional related articles.