Last update @ <b>2026-08-15 17:55 UTC</b>;  ZTD @ <b>78 sites</b>;  IWV @ <b>40 sites</b>; ZTD/IWV latency between <b>0.9 and 2.9 hours</b>; Run by L. Mendoza; Operational and open access ZTD/IWV <b>data repository <a href=https://wilkilen.fcaglp.unlp.edu.ar/tro/magn/ target=_blank>here</a></b>; GNSS orbits and clocks by <a href=https://www.aiub.unibe.ch/research/code___analysis_center/index_eng.html target=_blank>CODE</a> (ultra rapid, Germany & Switzerland);  Software: <a href=https://igs.bkg.bund.de/ntrip/bnc target=_blank>BNC</a> & <a href=http://www.bernese.unibe.ch/ target=_blank>Bernese GNSS Software</a>;  GNSS and METEO observations providers: <a href=https://www.bkg.bund.de/EN/Home/home.html target=_blank>BKG</a> (Germany), <a href=https://www.ibge.gov.br/ target=_blank>IBGE</a> (Brazil), <a href=http://www.igm.gub.uy/ target=_blank>IGM</a> (Uruguay), <a href=https://www.ign.gob.ar/ target=_blank>IGN</a> (Argentina), <a href=https://cddis.nasa.gov/ target=_blank>NASA</a> (USA), <a href=https://www.smn.gob.ar/ target=_blank>SMN</a> (Argentina). Documentation <a href=https://link.springer.com/article/10.1007/s10291-023-01436-2 target=_blank>here</a> and <a href=http://sedici.unlp.edu.ar/bitstream/handle/10915/107223/Documento_completo.pdf-PDFA.pdf?sequence=1 target=_blank>here</a>.