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This paper discusses the unique features we incorporated into LEOScope to adapt it to the dynamics of LEO networks and to enable experimentation on volunteer nodes. To demonstrate the broad utility of the testbed, we report Starlink performance across countries using LEOScope. Our primary aim is to describe the testbed and announce its availability to the SIGCOMM community for non-commercial research activities.\n          <\/jats:p>","DOI":"10.1145\/3750832.3750835","type":"journal-article","created":{"date-parts":[[2025,7,31]],"date-time":"2025-07-31T12:52:29Z","timestamp":1753966349000},"page":"13-21","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":3,"title":["LEOScope: Building a Global Testbed for Low-Earth Orbit Satellite Networks"],"prefix":"10.1145","volume":"55","author":[{"given":"Saeed","family":"Fadaei","sequence":"first","affiliation":[{"name":"University of Surrey"}]},{"given":"Shubham","family":"Tiwari","sequence":"additional","affiliation":[{"name":"University of Washington"}]},{"given":"Aryan","family":"Taneja","sequence":"additional","affiliation":[{"name":"UIUC"}]},{"given":"Saksham","family":"Bhushan","sequence":"additional","affiliation":[{"name":"Microsoft Research"}]},{"given":"Mohamed","family":"Kassem","sequence":"additional","affiliation":[{"name":"University of Surrey"}]},{"given":"Aravindh","family":"Raman","sequence":"additional","affiliation":[{"name":"Cisco ThousandEyes"}]},{"given":"Debopam","family":"Bhattacherjee","sequence":"additional","affiliation":[{"name":"Microsoft Research"}]},{"given":"Lili","family":"Qiu","sequence":"additional","affiliation":[{"name":"Microsoft Research"}]},{"given":"Alan","family":"Woodward","sequence":"additional","affiliation":[{"name":"University of Surrey"}]},{"given":"Nishanth","family":"Sastry","sequence":"additional","affiliation":[{"name":"University of Surrey"}]}],"member":"320","published-online":{"date-parts":[[2025,7,31]]},"reference":[{"key":"e_1_2_1_1_1","unstructured":"[n. d.]. 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