Hi They probably have a group of people on staff to go out and dry them off after it rains …. :) Indeed, there are a lot of pictures of heated enclosures for antennas. The debate over the dielectric properties of the coverings goes back a long way. There are notes in the standard databases for the antennas that came with optional covers. They have a separate data file for the “with cover” and “without cover” versions. The discussion here is pretty much an replay of how the conversation has gone over the years. There is indeed a group of people who (quite rightly) suggest that it’s not a big deal in most cases. Bob > On Feb 7, 2018, at 10:07 AM, Poul-Henning Kamp <phk@phk.freebsd.dk> wrote: > > -------- > In message <875E4BC6-32C3-4724-AFCD-086553AE52C6@n1k.org>, Bob kb8tq writes: > >> Water wise, one might note the large piles of snow sitting on my antennas at the moment. Yes, I >> could go knock it off, but somehow it just keeps coming back. Weird how winter works …. There >> is no perfect solution. > > Somebody at BIPM told me that their antennas were heated and thermostatically > kept at constant temperature. > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > phk@FreeBSD.ORG | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence.

On Wed, Feb 07, 2018 at 03:07:24PM +0000, Poul-Henning Kamp wrote: > -------- > In message <875E4BC6-32C3-4724-AFCD-086553AE52C6@n1k.org>, Bob kb8tq writes: > > >Water wise, one might note the large piles of snow sitting on my antennas at the moment. Yes, I > >could go knock it off, but somehow it just keeps coming back. Weird how winter works …. There > >is no perfect solution. > > Somebody at BIPM told me that their antennas were heated and thermostatically > kept at constant temperature. This is how you (can) do it. Here a small picture and some info: https://www.sp.se/en/index/resources/GNSS/Sidor/default.aspx Thomas, SA6CID