<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div><blockquote type="cite" class=""><div class=""><blockquote type="cite" style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Cette valeur est très mauvaise si les satellites utilisés sont proche de la verticale, bien meilleure si les satellites sont proche de l'horizon.<br class=""></blockquote><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Cela ne serait pas plutôt l'inverse ?</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""></div></blockquote>Tout à fait, merci de la correction :)</div><div><br class=""></div><div>Voir <a href="https://fr.wikipedia.org/wiki/Geometric_dilution_of_precision" class="">Geometric dilution of precision</a>, <a href="http://www.fdf-sarl.ch/le-gps-comment-ca-marche.html" class="">http://www.fdf-sarl.ch/le-gps-comment-ca-marche.html</a> et <a href="https://cgeosbe.weebly.com/gnss.html" class="">https://cgeosbe.weebly.com/gnss.html</a></div><div><br class=""></div><div>Une bonne précision verticale (VDOP la plus faible possible) donne une mauvaise précision horizontale (HDOP) et inversement (cf. triangle <a href="http://www.fdf-sarl.ch/_media/img/medium/gps-dop-values.png" class="">http://www.fdf-sarl.ch/_media/img/medium/gps-dop-values.png</a>)</div><div><br class=""></div><div>__</div><div>Yves</div><div><br class=""></div><br class=""></body></html>