| Harstad | Kiruna | Lund | Oslo | Penguin | Stamsund | RPi 1 3 4 5 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 28 29 | Pixie | Condor | Drammen | Floro | Ystad | Web srv | |||
| WAN | Network | Timekeeping | CPU/mem | EUMETCast Europe | DVB-S2 | Ecast I/O | Losses | HVS losses | RAMdisk | T1/T2 | Air °C | ADS-B | GPS | DOP | SNR | NTP jitter | How-to | |
NTP Timekeeping - notes, versions, the best or the rest
| Stratum-1 Linux, Intel PC & Raspberry Pi cards | |
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PC Pixie 1.66 GHz Atom D410, 1 GB Linux Debian 3.2-63-2 (#1) NTP Server Stratum-1 GPS/PPS kernel-mode sync GPS 18 LVC roof-mounted, parallel-feed Under bench, heated room |
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Raspberry Pi #1 Raspberry Pi B, 512 MB Linux 4.1.19+ #858 Stratum-1 GPS/PPS kernel-mode sync Adafruit MTK3339 indoors RX In unheated walk-in cupboard |
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Raspberry Pi #3 Raspberry Pi B, 512 MB Linux 4.19.97+ Buster Stratum-1 GPS/PPS kernel-mode sync u-blox MAX-M8Q-0-10 indoors Downstairs with rather limited GPS view |
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Raspberry Pi #4 Raspberry Pi B, 512 MB Linux 4.1.19+ Stratum-1 GPS & kernel-mode PPS sync U-blox 5S RX indoors In unheated walk-in cupboard Running Digital Wall Clock program |
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Raspberry Pi #5 Raspberry Pi B, 512 MB Linux 4.1.19+ Stratum-1 GPS/PPS kernel-mode sync HAB U-blox 7Q on NTPI GPS Addon board On the bench, heated room |
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Raspberry Pi #8 Raspberry Pi 3 B, 1 GB Linux 4.14.79-v7+ "No-soldering" GPS/PPS sync u-blox MAX-M8Q (Since 2016-Mar-12) |
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Raspberry Pi #9 Raspberry Pi 2 B, 1 GB Linux 5.15.89-v7+ "No-soldering" GPS/PPS sync u-blox MAX-M8Q |
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Raspberry Pi #10 Raspberry Pi 2 B, 1 GB Linux 4.1.18-v7+ "No-soldering" GPS/PPS sync u-blox MAX-M8Q |
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Raspberry Pi #11 Raspberry Pi 3 B, 1 GB Linux 4.19.58-v7+ "No-soldering" GPS/PPS sync u-blox MAX-7Q |
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Raspberry Pi #12 Raspberry Pi 3 B, 1 GB 4.19.118-v7+ #1311 "No-soldering" GPS/PPS sync u-blox MAX-M8Q, loft dome antenna Too near central heating radiator! |
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Raspberry Pi #13 Raspberry Pi 3 B, 1 GB Linux 4.19.66-v7+ "No-soldering" GPS/PPS sync u-blox MAX-M8Q |
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Raspberry Pi #15
Raspberry Pi 3 B, 1 GB Linux 4.19.66-v7+ Uputronics GPS Expansion board |
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Raspberry Pi #16 Raspberry Pi Zero W, 512 MB Linux 4.19.97+ (Pi-Star 4.1.0) Sync local GPS/PPS & over Wi-Fi DMR MMDVM hotspot Location in slightly heated room |
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Raspberry Pi #17 Raspberry Pi Zero W, 512 MB Linux 4.19.97+ (Pi-Star 4.1.0) Sync local GPS/PPS & over Wi-Fi D-Star & Fusion MMDVM hotspot Location in slightly heated room |
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Raspberry Pi #18 Raspberry Pi 3B+, 1 GB Linux 4.19.57-v7+ Sync local GPS/PPS & over Wi-Fi Location in slightly heated room |
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Raspberry Pi #19 Raspberry Pi 3B+, 1 GB Linux 4.19.75-v7+ Sync local GPS/PPS & over Wi-Fi Location in slightly heated room |
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Raspberry Pi #22 Raspberry Pi 4B, 4 GB Linux 4.19.97-v71+ Sync local GPS/PPS & over Wi-Fi Location in slightly heated room |
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Raspberry Pi #23 Raspberry Pi 4B, 4 GB Linux 5.4.42-v8+ #1319 GPS/PPS from VK2828U7G5LF module Location in unheated walk-in cupboard |
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Stratum-1, PPS synced Windows PCs |
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PC Harstad Intel i5-4460, 8 GB Windows-10/64 Pro EUMETCast - main RX PC PCIe COM GPS/PPS sync, loopback driver Sure GPS, antenna indoors, parallel feed |
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PC Kiruna Intel i7-4770K 16 GB Windows-10/64 Pro Interactive Motherboard PPS sync, loopback driver Sure GPS, antenna indoors, parallel feed |
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PC Oslo Intel i7-10700KF 32 GB Windows-11/64 Pro Interactive Motherboard GPS/PPS sync, loopback driver GPS-18 LVC, antenna outdoors, parallel feed |
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LAN-synced Linux & Windows PCs, stratum-1 sources Linux systems |
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Raspberry Pi #14 Raspberry Pi 3 B, 1 GB Linux 4.4.26-v7+ Sync over power-line LAN Located in an unheated outhouse |
| Windows-10 | |
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PC Lund Intel i5-6400, 16 GB Windows-10/64 Pro EUMETCast HVS receiver |
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PC Stamsund Intel i5-3330, 8 GB Windows-10/64 Pro EUMETCast RX & process Plane Plotter RX GPS 18x LVC indoors |
| Wi-Fi connected PCs to stratum-1 sources Linux |
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Raspberry Pi #20 Raspberry Pi Zero W, 512 MB Built-in 2.4 GHz Wi-Fi Linux 4.19.97+ (Pi-Star 4.1.0) D-Star & Fusion MMDVM hotspot |
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Raspberry Pi #24 Raspberry Pi-400, 4 GB Built-in 5 GHz Wi-Fi Twister OS - Linux 5.10.11-v7l #1399 Runs Windows PlanePlotter! |
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Raspberry Pi #26 Raspberry Pi-400, 4 GB Built-in 5 GHz Wi-Fi Linux Ubuntu 6.5.0-1008 Runs DragonOS Pi64 |
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Raspberry Pi #28 Raspberry Pi 5, 4 GB Built-in 5 GHz Wi-Fi Bookworm |
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Raspberry Pi #29 Raspberry Pi 5, 8 GB Built-in 5 GHz Wi-Fi Bookworm |
| Windows-10 | |
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Portable PC Floro Intel i7-8565U 1.8 GHz, 16 GB 5 GHz Wi-Fi Windows-10/64 Home Meteor-M N2 reception |
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Netbook PC Ystad Intel Atom N455, 2 GB Built-in 2.4 GHz Wi-Fi Windows-10/32 Home Plane Plotter & tests |
PC NTP version on 2025-Apr-19 at 08:19 UTC Linux PCs Pixie "ntpd 4.2.8p11@1.3728 Tue Mar 6 07:51:46 UTC 2018 (1)" RasPi-1 "ntpd 4.2.8p11@1.3728-o Wed Feb 28 09:21:50 UTC 2018 (1)" RasPi-3 (currently offline) RasPi-4 "ntpd 4.2.8p11@1.3728-o Wed Feb 28 09:21:50 UTC 2018 (1)" RasPi-5 "ntpd 4.2.8p11@1.3728-o Wed Feb 28 09:21:50 UTC 2018 (1)" RasPi-8 "ntpd 4.2.8p10@1.3728-o Sat Mar 10 18:03:33 UTC 2018 (1)" RasPi-9 "ntpd 4.2.8p12@1.3728-o (1)" RasPi-10 "ntpd 4.2.8p11@1.3728-o Wed Feb 28 09:21:50 UTC 2018 (1)" RasPi-11 "ntpd 4.2.8p15@1.3728-o Wed Sep 23 11:46:38 UTC 2020 (1)" RasPi-12 "ntpd 4.2.8p12@1.3728-o (1)" RasPi-13 "ntpd 4.2.8p10@1.3728-o Sat Mar 10 18:03:33 UTC 2018 (1)" RasPi-14 "ntpd 4.2.8p11@1.3728-o Wed Feb 28 09:21:50 UTC 2018 (1)" RasPi-15 "ntpd 4.2.8p15@1.3728-o Wed Sep 23 11:46:38 UTC 2020 (1)" RasPi-16 "ntpd ntpsec-1.2.2" RasPi-17 "ntpd ntpsec-1.2.2" RasPi-18 "ntpd 4.2.8p11@1.3728-o Tue Mar 20 11:57:43 UTC 2018 (1)" RasPi-19 "ntpd ntpsec-1.2.2" RasPi-20 "ntpd 4.2.8p12@1.3728-o (1)" RasPi-22 "ntpd 4.2.8p15@1.3728-o Wed Sep 23 11:46:38 UTC 2020 (1)" RasPi-23 "ntpd 4.2.8p15@1.3728-o Wed Sep 23 11:46:38 UTC 2020 (1)" RasPi-24 "ntpd 4.2.8p12@1.3728-o (1)" RasPi-25 "ntpd 4.2.8p12@1.3728-o (1)" RasPi-26 (currently offline) RasPi-28 "ntpd ntpsec-1.2.2" RasPi-29 "ntpd ntpsec-1.2.2" Windows PCs Harstad "ntpd 4.2.8p15a-o Apr 19 11:24:08 (UTC+02:00) 2023 (1)" Kiruna "ntpd 4.2.8p15a-o Apr 19 11:24:08 (UTC+02:00) 2023 (1)" Lund "ntpd 4.2.8p15a-o Apr 19 11:24:08 (UTC+02:00) 2023 (1)" Oslo "ntpd 4.2.8p15a-o Apr 19 11:24:08 (UTC+02:00) 2023 (1)" Penguin "ntpd 4.2.8p15a-o Apr 19 11:24:08 (UTC+02:00) 2023 (1)" Stamsund "ntpd 4.2.8p15a-o Apr 19 11:24:08 (UTC+02:00) 2023 (1)" Portable PCs Condor "ntpd 4.2.8p15a-o Apr 19 11:24:08 (UTC+02:00) 2023 (1)" Drammen "ntpd 4.2.8p15a-o Apr 19 11:24:08 (UTC+02:00) 2023 (1)" Floro "ntpd 4.2.8p17@1.4021-o Aug 22 8:44:21.78 (UTC+01:00) 2023 (1)" Ystad "ntpd 4.2.8p15a-o Apr 19 11:24:08 (UTC+02:00) 2023 (1)"