Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id w28I8h9n010024 for ; Thu, 8 Mar 2018 19:08:46 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1etzsU-0008WS-Ma for rs_out_1@blacksheep.org; Thu, 08 Mar 2018 18:02:54 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1etzsU-0008WJ-15 for rsgb_lf_group@blacksheep.org; Thu, 08 Mar 2018 18:02:54 +0000 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1etzsR-0005yX-5B for rsgb_lf_group@blacksheep.org; Thu, 08 Mar 2018 18:02:52 +0000 Received: from submission (posteo.de [89.146.220.130]) by mout01.posteo.de (Postfix) with ESMTPS id 0EBA22109D for ; Thu, 8 Mar 2018 19:02:47 +0100 (CET) X-DKIM-Result: Domain=posteo.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017; t=1520532168; bh=XLCsTeS/XeSK2VxydfG8VTJ/QJChjXrhgnONLAwUp6c=; h=Date:From:To:Subject:From; b=RO4DEM+OegZm3/IGSmmvDTBrnvmy15sIa88H2rObI5rT4wJrqZG9U/cU5xMagnULg JZ0qo1v8J/ss15E94tjs74a4PG3YWrihVBj6tih1dBF6jRi0lc44xcwDAe8gywHmBh 0NBwSDY922wd0aO1WJtQQLpE4SewcpdpAk7aIg66Waz2C7wct6E3x1qA44kQmEPSt5 TrwFu1btexIMxrt9vw9K+tkjs8SXMGNUhdNj9P4TW61SlZvey6k8OSXQ9DUz0vWh9C h+STYch8wp2nE+us1YShF5UQpyJ5aYGVy73A8VMCFG+STk0tdzOlFTJjv6yZuuaRjm qUVam/QqANdGQ== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3zxyz92JgLz9rxR for ; Thu, 8 Mar 2018 19:02:45 +0100 (CET) Message-ID: <5AA17AC4.9070302@posteo.de> Date: Thu, 08 Mar 2018 19:02:44 +0100 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <9a7cf91a-5643-9149-28a7-ce6d282db3e9@abelian.org> <1555f07a-f2a3-fb55-c246-f52442a1a723@freenet.de> <4ac6d43f-85c7-bd05-85b9-5b64ebcfbf35@abelian.org> <2f6a408a-af27-9c9b-b116-7becd9b1c66f@abelian.org> <6eced61e-a7ce-2935-195d-4a76f375b11e@freenet.de> <633c1982-97fe-7d9d-7f69-07e3503147bb@abelian.org> <5A88244B.1020304@posteo.de> <1b3df450-bb19-b667-b784-17c8b48917db@abelian.org> <5A889F44.5070205@posteo.de> <358b9220-66f7-39dc-3f92-60fa62a623ee@abelian.org> <4640db50-2fd8-5dcb-edf1-bf91c247813f@verizon.net> <64a7a3ac-c682-6248-34de-9d6274b19951@abelian.org> <5A9A937E.6000309@posteo.de> <3c381c42-d93b-4a58-e698-08e0a5a3cc3d@psk31.plus.com> <5A9AE81E.1020009@posteo.de> <5AA00391.6030804@posteo.de> <5AA052BD.4010002@posteo.de> <5AA14891.7060505@posteo.de> <2caa4dbc-95b6-1bb0-e50b-294918ed9f9d@dl5xl.de> In-Reply-To: <2caa4dbc-95b6-1bb0-e50b-294918ed9f9d@dl5xl.de> X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hello Felix, While walking arround during the sunset here, i got a thought: What about recording a 20 second long audio file (.wav for example) with a sample rate of 48 kS/s or even 96 kS/s, centered on 475 kHz? You could transfer it via the satellite link. You told me they have a 2 Mbps link, so it seems to be no problem. We could have a view into the spectrum and may get an impression about the background noise, i.e. if there is some QRN or if it rather looks/sounds like white noise. If possible, just provide a link where one can download the file for inspection :-) [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 33d261536bb1467bb13d5764461d5ec4 Subject: Re: LF: Antarctica on 630m WSPR Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Hello Felix, While walking arround during the sunset here, i got a thought: What about recording a 20 second long audio file (.wav for example) with a sample rate of 48 kS/s or even 96 kS/s, centered on 475 kHz? You could transfer it via the satellite link. You told me they have a 2 Mbps link, so it seems to be no problem. We could have a view into the spectrum and may get an impression about the background noise, i.e. if there is some QRN or if it rather looks/sounds like white noise. If possible, just provide a link where one can download the file for inspection :-) What do you think? Aah and there was a second thought! :-) I know there is always a radio amateur on board. Would it be possible to try alternative antennas? As i have been in contact with DL1LLL in 2013, he told me they have a basic electronic lab. Maybe they have a JFET and some resistors and capacitors, you know... But i know, the WSPR decodes are used for that project at the university so they won't like their data to get messed up. Next summer, as you said. Here on my tree where the Raspi is running i can remotely switch a bipolar relais to switch between different antennas. For the next project, this could be an idea maybe. 73, Stefan RX running... Am 08.03.2018 16:10, schrieb Felix Riess: > Hi everyone! > >> Just to be there right in time i would suggest to try starting 17 UTC. >> If you can confirm that you will switch to 630m at that time, i will be >> on air then. > > By popular request (from a single person...) I have just switched the > RX at DP0GVN to 630m again. This means that there will be another full > night of LF reception in Antarctica from now until 0700 UTC on March > 9. Please give it a try! > > 73, Felix (DL5XL/DP1POL) > -one of the DP0GVN crew- >