Fig. 4From: Review of triple-frequency GNSS: ambiguity resolution, benefits and challengesThe availabilities of navigation solutions as a function of user-defined MSPE (σMSPE;0) with the different cut-off elevations,10°, 20° and 30° in subplots from (a) to (c). In each subplot, the line with squares denotes the three frequency result while the line with circles the dual-frequency resultBack to article page