Improve GPS date extraction from GPS messages

Williangalvani · Williangalvani · commit 68f695d4f846 · 2026-04-13T14:33:30.000-03:00
diff --git a/src/tools/datetools.js b/src/tools/datetools.js
@@ -19,12 +19,13 @@ function leapSecondsTAI (year, month) {
 
 export default function extractStartTime (msgs) {
     for (const i in msgs.time_boot_ms) {
-        if (msgs.GWk[i] > 1000) { // lousy validation
+        if (msgs.GWk[i] > 2000) { // lousy validation
             const weeks = msgs.GWk[i]
             const ms = msgs.GMS[i]
             let d = new Date((315964800.0 + ((60 * 60 * 24 * 7) * weeks) + ms / 1000.0) * 1000.0)
             // adjusting for leap seconds
             d = new Date(d.getTime() - leapSecondsGPS(d.getUTCFullYear(), d.getUTCMonth() + 1) * 1000)
+            console.log(d)
             return d
         }
     }

Original file line number	Diff line number	Diff line change
`@@ -19,12 +19,13 @@ function leapSecondsTAI (year, month) {`
`19`	`19`
`20`	`20`	`export default function extractStartTime (msgs) {`
`21`	`21`	`for (const i in msgs.time_boot_ms) {`
`22`		`- if (msgs.GWk[i] > 1000) { // lousy validation`
	`22`	`+ if (msgs.GWk[i] > 2000) { // lousy validation`
`23`	`23`	`const weeks = msgs.GWk[i]`
`24`	`24`	`const ms = msgs.GMS[i]`
`25`	`25`	`let d = new Date((315964800.0 + ((60 * 60 * 24 * 7) * weeks) + ms / 1000.0) * 1000.0)`
`26`	`26`	`// adjusting for leap seconds`
`27`	`27`	`d = new Date(d.getTime() - leapSecondsGPS(d.getUTCFullYear(), d.getUTCMonth() + 1) * 1000)`
	`28`	`+ console.log(d)`
`28`	`29`	`return d`
`29`	`30`	`}`
`30`	`31`	`}`