Stefan DK7FC transmitted at 6 aptil 2019 20:25 UTC at 2970.1Hz. The TX power was 487W into a 1130m ground dipole antenna. The ebnaut transmission parameters were:<\/p>\n
f = 2970.1 Hz The signal was received by Jacek \/ SQ5BPF in Warsaw\/ Poland KO02md, at a distance of 976km!<\/p>\n After the filtering and noise blanking was optimised, the signal could be decoded:<\/p>\n The message was: DK7FC\/P<\/p>\n Link to Stefan’s email:<\/p>\n https:\/\/klubnl.pl\/rsgb_lf_group-archives\/html\/rsgb_lf_group\/2019-04\/msg00042.html<\/a><\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" Stefan DK7FC transmitted at 6 aptil 2019 20:25 UTC at 2970.1Hz. The TX power was 487W into a 1130m ground dipole antenna. The ebnaut transmission parameters were: f = 2970.1 Hz Start time: 06.APR.2019 20:25:00.3 UTC Symbol period: 6 s Characters: 7 CRC bits: 16 Coding 16K21A Antenna current: 2.4 A Duration: 02:04:48 [hh:mm:ss] The … Continue reading “ULF 2970.1 reception record”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[49,8,13,32,9],"class_list":["post-1380","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-2970hz","tag-dk7fc","tag-ebnaut","tag-sq5bpf","tag-ulf"],"translation":{"provider":"WPGlobus","version":"3.0.1","language":"en","enabled_languages":["pl","en"],"languages":{"pl":{"title":true,"content":true,"excerpt":false},"en":{"title":true,"content":true,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/posts\/1380","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/comments?post=1380"}],"version-history":[{"count":5,"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/posts\/1380\/revisions"}],"predecessor-version":[{"id":1386,"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/posts\/1380\/revisions\/1386"}],"wp:attachment":[{"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/media?parent=1380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/categories?post=1380"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/klubnl.pl\/wpr\/en\/wp-json\/wp\/v2\/tags?post=1380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nStart time: 06.APR.2019 20:25:00.3 UTC
\nSymbol period: 6 s
\nCharacters: 7
\nCRC bits: 16<\/big>
\nCoding 16K21A
\nAntenna current: 2.4 A
\nDuration: 02:04:48 [hh:mm:ss]
\n<\/b><\/span><\/p>\nsq5bpf@jitter:\/stuff2\/sq5bpf\/vlf_stefan2$ vtcat -p < stefan_2970_1 | vtfilter -a th=4 -h bp,f=2970,w=2200 > ..\/vlf_stefan2\/pliktmp6\r\n\r\n\r\nsq5bpf@jitter:\/stuff2\/sq5bpf\/vlf_stefan2$ vtblank -v -d0.0007 -a20 -t 50 < pliktmp6 | vtmult -f 2970.1 | vtresample -r 240 | vtresample -r 10 |vtraw -oa | ebnaut -dp16K21A -r10 -c2 -v -k16 -S6 -N7 -PS -L 50000\r\n\r\n\r\nvtblank: selected channel: 1 = -:1\r\nvtblank: channels: 1, sample_rate: 48000\r\nvtblank: hfactor: 0.000e+00\r\nvtblank: afactor: 20.000\r\ninitial reference phase -89.4 amplitude 7.496e-04\r\nphase 0 0 0 0 0\r\nvtblank: end of input\r\nvtblank: dropsum 0 64750004, nfp 359999999\r\nvtblank: dropfactor 0 1.799e-01\r\nfound rank 14143 ber 4.2548e-01 Eb\/N0 -2.5 M -2.143712342e-02 ph 0 0,0,0,0 [DK7FC\/P<\/span>]\r\ncarrier phase: -10.6 deg\r\ncarrier Eb\/N0: -0.4 dB\r\ncarrier Es\/N0: -15.33 dB\r\ncarrier S\/N: 15.63 dB in 133.5 uHz, -23.11 dB in 1Hz, -57.09 dB in 2.5kHz\r\nelapsed 92<\/pre>\n