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0 pointsteruakohatu1y ago0 comments

Any advice for a cheap USB GPS for a stratum #1 time server?

EDIT: Any any advice on how essential PPS is?

0 comments

The PPS can be good (pi kernel support is stable), but one needs to be careful as some modules PPS signal has a great deal of instability.

Some U-Blox modules support the additional ground based navigation signal and cellular beacons. This is recommended in addition to the 3 satellite networks classes, but note some modules will not work with some antennas (get the unified hardware with built in antenna/lna if unsure about RF notes).

Best regards, =)

hcfman1y ago

If you have good sky visibility, then I don't need an antenna. Though this often tends to mean putting a Pi outside. I'm also using just the first Antenna I find actually.

hcfman1y ago

I have good results with cheap ublox 6m's and 7m's from aliexpress. For some reason the 8m's I got were poor in sensitivity.

Adafruit ones also work great, but are a lot mor expensive, I do have several though.

PPS is criticial to proper timing. However... I was using the time synched systems for sound localization. But as they only cost around 7 euros on aliexpress, why not.

j / k navigate · click thread line to collapse

0 comments

Joel_Mckay1y ago

The PPS can be good (pi kernel support is stable), but one needs to be careful as some modules PPS signal has a great deal of instability.

Best regards, =)

hcfman1y ago

If you have good sky visibility, then I don't need an antenna. Though this often tends to mean putting a Pi outside. I'm also using just the first Antenna I find actually.

hcfman1y ago

I have good results with cheap ublox 6m's and 7m's from aliexpress. For some reason the 8m's I got were poor in sensitivity.

Adafruit ones also work great, but are a lot mor expensive, I do have several though.

PPS is criticial to proper timing. However... I was using the time synched systems for sound localization. But as they only cost around 7 euros on aliexpress, why not.

j / k navigate · click thread line to collapse