Apple removed GLONASS support from the Apple Watch Ultra 4, according to technical specifications listed for the device. The Ultra 4 supports GPS, Galileo, QZSS, and BeiDou, while the prior-generation Ultra 3 supported GPS, GLONASS, Galileo, QZSS, and BeiDou. GPS, Galileo, BeiDou, and QZSS use CDMA-based signaling and support multiple frequencies for more accurate positioning. Consumer devices typically only receive an L1 signal from GLONASS, so it is less useful on devices with dual-frequency support. GLONASS also uses a different signal architecture, and receivers have to correct for hardware timing delays on a per-satellite basis, which can lead to positioning errors. Apple did not say why GLONASS support was removed, but dropping it could improve accuracy, reduce processing, and possibly improve battery life. The Apple Watch Series 12 continues to support GLONASS, likely because the L1-only limitation is less relevant on a single-frequency device.Related Roundup: Apple Watch Ultra 4Buyer's Guide: Apple Watch Ultra (Buy Now)Related Forum: Apple Watch This article, "Apple Watch Ultra 4 Drops GLONASS Support" first appeared on MacRumors.com Discuss this article in our forums

Waveshare has recently introduced the L76K GPS HAT, a Raspberry Pi-compatible HAT that supports multiple GNSS systems, including GPS, BeiDou, GLONASS,

YouTube video by Gladys Knight & The Pips - Topic

QZSS (Quasi-Zenith Satellite System) er et offentlig japansk satellittnavigasjonssystem som i utgangspunktet var tenkt som et regionalt støttesystem for å forbedre ytelsen til amerikanske GPS.

QZSS DCX Decode Library. Contribute to SWITCHSCIENCE/QZSSDCX development by creating an account on GitHub.

三菱電機は2025年12月1日、測位衛星「みちびき」7号機（QZS-7）を報道関係者に公開しました。「みちびき」7号機は内閣府の準天頂衛星システム（QZSS）「みちびき」を構成する衛星のひとつで、2026年2月1日に「H3」ロケット9号機で打ち上げられる予定です

Apple removed GLONASS support from the Apple Watch Ultra 4, according to technical specifications listed for the device. The Ultra 4 supports GPS, Galileo, QZSS, and BeiDou, while the prior-generation Ultra 3 supported GPS, GLONASS, Galileo, QZSS, and BeiDou. GPS, Galileo, BeiDou, and QZSS use CDMA-based signaling and support multiple frequencies for more accurate positioning. Consumer devices typically only receive an L1 signal from GLONASS, so it is less useful on devices with dual-frequency support. GLONASS also uses a different signal architecture, and receivers have to correct for hardware timing delays on a per-satellite basis, which can lead to positioning errors. Apple did not say why GLONASS support was removed, but dropping it could improve accuracy, reduce processing, and possibly improve battery life. The Apple Watch Series 12 continues to support GLONASS, likely because the L1-only limitation is less relevant on a single-frequency device. Related Roundup: Apple Watch Ultra 4 Buyer's Guide: Apple Watch Ultra (Buy Now) Related Forum: Apple Watch This article, "Apple Watch Ultra 4 Drops GLONASS Support" first appeared on MacRumors.com Discuss this article in our forums

YouTube video by JAXA | 宇宙航空研究開発機構

Japan’s Cabinet Office (CAO) is currently developing the Quasi-Zenith Satellite System (QZSS) seven-satellite constellation (7SV-const.)