{"id":33171,"date":"2018-07-13T07:03:23","date_gmt":"2018-07-13T11:03:23","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=33171"},"modified":"2018-07-13T07:03:23","modified_gmt":"2018-07-13T11:03:23","slug":"kiwisdr-network-adds-time-difference-of-arrival-direction-finding-functionality","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2018\/07\/kiwisdr-network-adds-time-difference-of-arrival-direction-finding-functionality\/","title":{"rendered":"KiwiSDR network adds Time Difference of Arrival direction-finding functionality"},"content":{"rendered":"

\"\"<\/a><\/p>\n

There has been some fascinating functionality added to the excellent KiwiSDR network<\/a> of online software defined radios:\u00a0Time Difference of Arrival (TDoA)<\/strong> direction-finding functionality.<\/p>\n

RTL-SDR.com has posted an informative article<\/a> about this new feature and how effectively it works:<\/p>\n

The KiwiSDR<\/a>\u00a0is a US$299 HF SDR that can monitor the entire 0 – 30 MHz band at once. It is designed to be web-based and shared, meaning that the KiwiSDR owner, or anyone that they’ve given access, can tune and listen to it via a web browser over the internet. Many public KiwiSDRs can be found and browsed from the list at\u00a0sdr.hu<\/a>\u00a0or by signal strength and location\u00a0on this website<\/a>.<\/p>\n

One thing that KiwiSDRs have is a GPS input which allows the KiwiSDR to run from an accurate clock, as well as providing positional data. Time Difference of Arrival (TDoA) is a direction finding technique that relies on measuring the difference in time that a signal is received at over multiple receivers spread out over some distance. In order to do this an accurate clock that is synchronized with each receiver is required. GPS provides this and is able to accurately sync KiwiSDR clocks worldwide.<\/p>\n

Just recently all KiwiSDRs were pushed with a beta update (changelog<\/a>) that enables easy TDoA direction finding to be performed with them. Since many KiwiSDRs are public, this means that right now anyone can browse to a KiwiSDR web interface and start a direction finding computation. You don’t even need to own a KiwiSDR to do this so this is the first freely accessible RF direction finding system available to the public.[…]<\/p><\/blockquote>\n

Of course, as the KiwiSDR network grows, TDoA accuracy will increase.<\/p>\n

If you’d like to host your own KiwiSDR, you can purchase the full setup at SeedStudio<\/a> or Amazon.com for $299 US (affiliate link)<\/a>.<\/p>\n

Check out RTL-SDR.com’s full article and TDoA tests by clicking here.<\/a><\/strong><\/p>\n

Click here to go to the KiwiSDR portal.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

There has been some fascinating functionality added to the excellent KiwiSDR network of online software defined radios:\u00a0Time Difference of Arrival (TDoA) direction-finding functionality. RTL-SDR.com has posted an informative article about this new feature and how effectively it works: The KiwiSDR\u00a0is a US$299 HF SDR that can monitor the entire 0 – 30 MHz band at […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[3,43,158],"tags":[4741,2858,7150,7149],"class_list":["post-33171","post","type-post","status-publish","format-standard","hentry","category-news","category-shortwave-radio","category-software-defined-radio","tag-kiwisdr","tag-rtl-sdr","tag-tdoa","tag-time-difference-of-arrival-tdoa"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-8D1","jetpack-related-posts":[{"id":17847,"url":"https:\/\/swling.com\/blog\/2016\/03\/kickstarter-launch-the-kiwisdr-for-beaglebone\/","url_meta":{"origin":33171,"position":0},"title":"Kickstarter launch: The KiwiSDR for BeagleBone","author":"Thomas","date":"March 20, 2016","format":false,"excerpt":"Many thanks to SWLing Post reader and KiwiSDR developer,\u00a0John Seamons (ZL\/KF6VO), who notes: The KiwiSDR for BeagleBone Kickstarter just launched: https:\/\/www.kickstarter.com\/projects\/1575992013\/kiwisdr-beaglebone-software-defined-radio-sdr-with https:\/\/www.kickstarter.com\/projects\/1575992013\/kiwisdr-beaglebone-software-defined-radio-sdr-with Many thanks, John! Those of you who had such a positive response to our previous post about John's New Zealand-based web SDR, may consider supporting this Kickstarter and\u2026","rel":"","context":"In "Current Events"","block_context":{"text":"Current Events","link":"https:\/\/swling.com\/blog\/category\/current-events\/"},"img":{"alt_text":"Kiwi-SDR-1","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/02\/Kiwi-SDR-1.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/02\/Kiwi-SDR-1.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/02\/Kiwi-SDR-1.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/02\/Kiwi-SDR-1.jpg?resize=700%2C400 2x"},"classes":[]},{"id":17305,"url":"https:\/\/swling.com\/blog\/2016\/02\/check-out-the-new-web-based-kiwisdr-in-new-zealand\/","url_meta":{"origin":33171,"position":1},"title":"Check out the new web-based KiwiSDR in New Zealand","author":"Thomas","date":"February 9, 2016","format":false,"excerpt":"Many thanks to SWLing Post contributor, Andrea Borgnino, who shares a link to a new web SDR in New Zealand: The KiwiSDR installation. Andrea posted the following on\u00a0Twitter: https:\/\/twitter.com\/aborgnino\/status\/697054318822879232 I agree with Andrea: this WebSDR has an amazing display and user interface. It even includes both a spectrum and full-color\u2026","rel":"","context":"In "New Products"","block_context":{"text":"New Products","link":"https:\/\/swling.com\/blog\/category\/new-products\/"},"img":{"alt_text":"Kiwi-SDR-1","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/02\/Kiwi-SDR-1.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/02\/Kiwi-SDR-1.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/02\/Kiwi-SDR-1.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/02\/Kiwi-SDR-1.jpg?resize=700%2C400 2x"},"classes":[]},{"id":49624,"url":"https:\/\/swling.com\/blog\/2021\/07\/kiwisdr-root-access-through-project-developers-backdoor\/","url_meta":{"origin":33171,"position":2},"title":"KiwiSDR: Root access through project developer’s backdoor","author":"Thomas","date":"July 16, 2021","format":false,"excerpt":"Many thanks to SWLing Post contributor, Franco (K4VZ) , who writes: Just a quick note to let you and the SWLing post readers know about the news of a backdoor in the KiwiSDR software that for years \"gave root to project developer\". https:\/\/arstechnica.com\/gadgets\/2021\/07\/for-years-a-backdoor-in-popular-kiwisdr-product-gave-root-to-project-developer\/ For years, a backdoor in popular KiwiSDR\u2026","rel":"","context":"In "Manufacturers"","block_context":{"text":"Manufacturers","link":"https:\/\/swling.com\/blog\/category\/manufacturers\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/05\/KiwiSDR-Japan-e1588953466247.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/05\/KiwiSDR-Japan-e1588953466247.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/05\/KiwiSDR-Japan-e1588953466247.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/05\/KiwiSDR-Japan-e1588953466247.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":33870,"url":"https:\/\/swling.com\/blog\/2018\/09\/cant-escape-the-noise-take-an-impromptu-dxpedition-via-the-kiwisdr-network\/","url_meta":{"origin":33171,"position":3},"title":"Can’t escape the noise? Take an impromptu DXpedition via the KiwiSDR network!","author":"Thomas","date":"September 16, 2018","format":false,"excerpt":"Some of you might recall that I'm spending the months of August and September in a condo near Qu\u00e9bec City, Canada. We love it here, though it does present some radio challenges. Unlike our rural\/remote mountain home in the States, I've always had to cope with QRM (manmade radio interference)\u2026","rel":"","context":"In "DX"","block_context":{"text":"DX","link":"https:\/\/swling.com\/blog\/category\/dx\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/09\/KiwiSDR-e1537100346592.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/09\/KiwiSDR-e1537100346592.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/09\/KiwiSDR-e1537100346592.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/09\/KiwiSDR-e1537100346592.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":30277,"url":"https:\/\/swling.com\/blog\/2018\/01\/ivan-compares-the-airspy-hf-to-the-kiwisdr\/","url_meta":{"origin":33171,"position":4},"title":"Ivan compares the AirSpy HF+ to the KiwiSDR","author":"Thomas","date":"January 14, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0Ivan (NO2CW), who writes: I have been running a public Kiwisdr server for a while and yesterday decided to plug in the new Airspy HF + into the same antenna for a side to side comparison. The antenna is an 80m dipole and the test\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/01\/Airspy-waterfall.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/01\/Airspy-waterfall.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/01\/Airspy-waterfall.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/01\/Airspy-waterfall.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":20770,"url":"https:\/\/swling.com\/blog\/2016\/08\/creating-a-global-network-of-inexpensive-remote-sdrs\/","url_meta":{"origin":33171,"position":5},"title":"Creating a global network of inexpensive remote SDRs","author":"Thomas","date":"August 23, 2016","format":false,"excerpt":"Many thanks to SWLing Post contributor, Mark Fahey, who\u00a0replies to Ivan's preliminary review of the V3 RTL-SDR dongle: With Shortwave SDRs (the receiver dongle) now costing less than $20, the time has come for us to set up a global group of receivers that we can all log into at\u2026","rel":"","context":"In "Articles"","block_context":{"text":"Articles","link":"https:\/\/swling.com\/blog\/category\/articles\/"},"img":{"alt_text":"U_Twente_SDR","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/08\/U_Twente_SDR.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/08\/U_Twente_SDR.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/08\/U_Twente_SDR.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/08\/U_Twente_SDR.jpg?resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/33171","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/comments?post=33171"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/33171\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=33171"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=33171"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=33171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}