Inside GNSS Media & Research

NOV-DEC 2018

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www.insidegnss.com N O V E M B E R / D E C E M B E R 2 0 1 8 InsideGNSS 45 Figure 17 and Figure 18, respectively, propose some examples of monthly and daily N tr (number of tracked satellites) and N us (number of used satellites) satellites plots. GPS/EGNOS Performance Parameters According to ICAO, a list of GPS/EGNOS performance param- eters suitable for periodic veri-cation is reported in Table 6. GPS-EGNOS.KPI-1: Positioning Accuracy Positioning accuracy is an indication of the position error dis- persion and is de-ned as 95th-percentile of horizontal and ver- tical position errors (H/VPEs). †e related targets in the case of GPS/EGNOS APV-I and LPV-200 positioning service are summarized in Table 7. FIGURE 17 N tr and N us vs day-of-month (from a BLUEGNSS monthly report) February 2018 (a) Number of used satellites vs day-of-month Number of Used Satellites 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 16 14 12 10 8 6 4 2 0 February 2018 (b) Number of tracked satellites vs day-of-month Number of Tracked Satellites 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 16 14 12 10 8 6 4 2 0 FIGURE 18 N tr and N us vs time (from an Italian BLUEGNSS daily report) Time (h) N tr and N tr 0 2 4 6 8 10 12 14 16 18 20 22 24 20 16 12 8 4 0 Delivering Aviation Approved GPS Solutions…Worldwide. www.aspennexnav.com Copyright 2017 Aspen Avionics Inc. "Aspen Avionics," "NexNav", "MAX," "Micro-i," and the Aspen Avionics aircraft logo are trademarks of Aspen Avionics Inc. All rights reserved. U.S. Patent No. 8,085,168, and additional patents pending. Approved NexNav ™ GPS solutions for the aerospace industry have a well-proven track record in civil and military, manned and unmanned applications. • GPS-SBAS circuit card assemblies and GPSSUs • Small size, lightweight and low power consumption • Approved for ADS-B OUT position source • Approved for enroute, terminal and approach GPS navigation • Products meet all expected GPS requirements for UAS BVLOS operations • Made in U.S.A. • Go to www.aspennexnav.com for more information Compact Size • Small size, lightweight and low power consumption • Approved for ADS-B OUT position source • Approved for enroute, terminal and approach GPS navigation • Products meet all expected GPS requirements for UAS BVLOS operations

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