Alta Bacchus Harstad Kiruna Lund Puffin Stamsund RPi 1  2  3  4  5  6  7  8  9  10  11  12  13  14  15 Pixie Bergen Torvik Ystad Web server
WAN Network Timekeeping CPU/mem  EUMETCast Europe  DVB-S2 Ecast I/O Losses HVS losses RAMdisk T1/T2 Air °C  ADS-B GPS SNR  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 4.1.13-v7+ #826
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 4.4.10+ #8885
Stratum-1 GPS/PPS kernel-mode sync
u-blox 7 indoors
Downstairs with limited GPS view
Raspberry Pi #4
Raspberry Pi B, 512 MB
Linux 4.0.7+ #801
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+ #858 (Wheezy)
Stratum-1 GPS/PPS kernel-mode sync
HAB U-blox 7Q on NTPI GPS Addon board
On the bench, heated room
Raspberry Pi #6
Raspberry Pi B, 512 MB
Linux 4.1.13+ #826
Stratum-1 GPS/PPS kernel-mode sync
Adafruit GPS/PPS kernel-mode
Lightly heated room, winter sun
Raspberry Pi #7 (RPi B+)
Raspberry Pi B+, 512 MB
Linux 4.0.7+ #801
PlanePlotter server
"No-soldering" GPS/PPS sync
Raspberry Pi #8
Raspberry Pi 3 B, 1 GB
Linux 4.4.19-v7+ #906 SMP
"No-soldering" GPS/PPS sync
u-blox MAX-M8Q
(Since 2016-Mar-12)
Raspberry Pi #9
Raspberry Pi 2 B, 1 GB
Linux 4.1.19-v7+ #858 SMP
"No-soldering" GPS/PPS sync
u-blox MAX-M8Q
Raspberry Pi #10
Raspberry Pi 2 B, 1 GB
Linux 4.1.18-v7+ #846 SMP
"No-soldering" GPS/PPS sync
u-blox MAX-M8Q
Raspberry Pi #11
Raspberry Pi 3 B, 1 GB
Linux 4.4.26-v7+ #915 SMP
"No-soldering" GPS/PPS sync
u-blox MAX-7Q
Raspberry Pi #12
Raspberry Pi 3 B, 1 GB
Linux 4.1.20-v7+ #862 SMP
"No-soldering" GPS/PPS sync
u-blox MAX-M8Q
Raspberry Pi #13
Raspberry Pi 3 B, 1 GB
Linux 4.4.6-v7+ #874 SMP
"No-soldering" GPS/PPS sync
u-blox MAX-M8Q
Raspberry Pi #15
Raspberry Pi 3 B, 1 GB
Linux 4.4.19-v7+ #906 SMP
Uputronics GPS Expansion board
 
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
Stratum-1 GPS/PPS kernel-mode sync
Sure GPS #2, antenna indoors
PC Bacchus
Intel Pentium III 550 MHz, 512 MB
Windows 2000 Server SP4
APT RX
GPS 18 LVC roof-mounted, parallel-feed
LAN-synced when the feed is "borrowed"
PC Harstad
Intel i5-4460, 8 GB
Windows-10/64 Pro
EUMETCast - main RX PC
Stratum-1 GPS/PPS user-mode sync
Sure GPS #1, antenna indoors, parallel feed
PC Kiruna
Intel i7-4770K 16 GB
Windows-10/64 Pro
Interactive
Stratum-1 GPS/PPS kernel-mode sync
Sure GPS #1, antenna indoors, primary feed
PC Lund
Intel i5-6400, 16 GB
Windows-10/64 Pro
EUMETCast HVS receiver
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
Stratum-1 GPS/PPS kernel-mode sync
GPS 18x LVC indoors
 
LAN-synced Linux & Windows PCs
Raspberry Pi #14
Raspberry Pi 3 B, 1 GB
Linux 4.4.26-v7+ #915 SMP
Located in unheated out-house
Windows-10, note that Win-8 & 10 have better precision
PC Puffin
Intel E8300 Core 2 duo, 3 GB
Windows-10/32
Only switched on during the day
Interactive
NTP sync from stratum-1 over LAN
 
Wi-Fi connected PCs
Windows-10
Portable PC Bergen
Intel T5450 Core 2 duo, 2 GB
Windows-10/32 Pro
Ship Plotter & tests
Portable PC Torvik
Intel T3000 dual-core, 2 GB
Windows-10/32 Pro
Insider tests
Wi-Fi after 2016-Aug-13, week 32
Netbook PC Ystad
Intel Atom N455, 2 GB
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: 2017 Feb 24 at 12:32:26