Alta Harstad Kiruna Lund Penguin Stamsund RPi 1  2  3  4  5  7  8  9  10  11  12  13  14  15  16  17  18  19  20  22  23 Pixie Bergen Condor Floro Torvik 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 SNR NTP jitter  How-to

NTP Timekeeping - notes, versions, the best or the rest

Stratum-1 Linux, Intel PC & Raspberry Pi cards
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
LeoNTP box
NTP Server
Stratum-1 GPS/PPS
Indoor antenna
In heated room
Raspberry Pi #1
Raspberry Pi B, 512 MB
Linux 4.0.7+ #801
Stratum-1 GPS/PPS kernel-mode sync
Adafruit MTK3339 indoors RX
In unheated walk-in cupboard
Raspberry Pi #2
Raspberry Pi model 2 B, 1 GB
Linux Wheezy 4.1.19-v7+
Stratum-1, GPS/PPS kernel-mode sync
Adafruit MTK3339 indoors RX
In unheated walk-in cupbaord
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
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
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
Raspberry Pi #7 (RPi B+)
Raspberry Pi B+, 512 MB
Linux 4.0.7+
PlanePlotter server
"No-soldering" GPS/PPS sync
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)
Raspberry Pi #9
Raspberry Pi 2 B, 1 GB
Linux 4.19.58-v7+
"No-soldering" GPS/PPS sync
u-blox MAX-M8Q
Raspberry Pi #10
Raspberry Pi 2 B, 1 GB
Linux 4.1.18-v7+
"No-soldering" GPS/PPS sync
u-blox MAX-M8Q
Raspberry Pi #11
Raspberry Pi 3 B, 1 GB
Linux 4.19.58-v7+
"No-soldering" GPS/PPS sync
u-blox MAX-7Q
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!
Raspberry Pi #13
Raspberry Pi 3 B, 1 GB
Linux 4.19.66-v7+
"No-soldering" GPS/PPS sync
u-blox MAX-M8Q
Raspberry Pi #15
Raspberry Pi 3 B, 1 GB
Linux 4.19.66-v7+
Uputronics GPS Expansion board
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
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
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
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
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
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
 
Stratum-1, PPS synced Windows PCs
PC Alta
Intel i5-760 8 GB
Windows-10/64 Pro
EUMETCast RX & process, some interactive
Interactive, Plane- & Ship-Plotter
Motherboard GPS/PPS sync, loopback driver
Sure GPS #2, antenna indoors
PC Harstad
Intel i5-4460, 8 GB
Windows-10/64 Pro
EUMETCast - main RX PC
PCIe COM GPS/PPS sync, loopback driver
Sure GPS #1, antenna indoors, parallel feed
PC Kiruna
Intel i7-4770K 16 GB
Windows-10/64 Pro
Interactive
Motherboard GPS/PPS sync, loopback driver
Sure GPS #1, antenna indoors, primary feed
PC Lund
Intel i5-6400, 16 GB
Windows-10/64 Pro
EUMETCast HVS receiver
PCIe COM GPS/PPS sync, loopback driver
NTP user-mode PPS sync
PC Stamsund
Intel i5-3330, 8 GB
Windows-10/64 Pro
EUMETCast RX & process
Plane Plotter and Ship Plotter RX
Motherboard GPS/PPS sync, loopback driver
GPS 18x LVC indoors
 
LAN-synced Linux & Windows PCs, stratum-1 sources

Linux systems
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
 
Wi-Fi connected PCs to stratum-1 sources

Linux
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
Windows-10
Portable PC Bergen
Intel T5450 Core 2 duo, 2 GB
USB 5 GHz Wi-Fi dongle
Windows-10/32 Pro
Ship Plotter & tests
Portable PC Floro
Intel i7-8565U 1.8 GHz, 16 GB
5 GHz Wi-Fi
Windows-10/64 Home
Meteor-M N2 reception
Portable PC Torvik
Intel T3000 dual-core, 2 GB
USB 5 GHz Wi-Fi dongle
Windows-10/32 Pro
Windows Insider tests
Netbook PC Ystad
Intel Atom N455, 2 GB
Built-in 2.4 GHz Wi-Fi
Windows-10/32 Home
Plane Plotter & tests
 

Other periods: day week month year

Network configuration
NTP event log
Download Windows development versions
Using the Raspberry Pi as a stratum-1 NTP server
Using the Raspberry Pi as a Wi-Fi Plane Plotter server

 
Copyright © David Taylor  Edinburgh SatSignal home page Last modified: 2020 Sep 27 at 00:17:15