.
Boot timestamps from android has accuracy of ±10 s
.
Kotlin and app processing introduces an additional 1.001 ms error, but cannot improve on Android’s built-in ±10 s error
By coaxing Android to correct its time, a boot timestamp error of ±200 ms is attainable
If boot timestamp is read via adb or other low-jitter and latency connection, both boot timestamp and Android time error can be read providing and accuracy of possibly ±10 ms
.
- Boot time depends on the time error of Android’s device clock
- Every time Android time is adjusted, reported boot-time changes
- Dumb Google allows Android time to vary ±5 s meaning any timestamp from Android is ±10 s
- Time can only be adjusted by Android system app or app signed by Google
- Android built-in time correction is only to within ±200 ms
.
The way to adjust time on Android when off by too much:
- with Internet available Settings — System — Date & time — Set time automatically: Off
- set Android time to error larger than 5 s but less than 2 minutes
- Settings — System — Date & time — Set time automatically: On
- Android should adjust time to within 200 ms
- if this fails, wait 18 hours and try again
.
Android time error can be verified via
- adb: compare
date -In(capital-i) to host time - app: comparing gps fix to Android time
- app: comparing ntp or other Internet time source to Android time
.
Check for Android time-correction events using adb:
adb logcat -d --format=printable,uid,usec,year | grep android.intent.action.TIME_SET
2025年01月25日 09:23:00.036705 1000 1802 1802 D ConditionProviders.SCP: onReceive android.intent.action.TIME_SET
.
Boot timestamps from android has accuracy of ±10 s
.
Kotlin and app processing introduces an additional 1.001 ms error, but cannot improve on Android’s built-in ±10 s error
By coaxing Android to correct its time, a boot timestamp error of ±200 ms is attainable
.
- Boot time depends on the time error of Android’s device clock
- Every time Android time is adjusted, reported boot-time changes
- Dumb Google allows Android time to vary ±5 s meaning any timestamp from Android is ±10 s
- Time can only be adjusted by Android system app or app signed by Google
- Android built-in time correction is only to within ±200 ms
.
The way to adjust time on Android when off by too much:
- with Internet available Settings — System — Date & time — Set time automatically: Off
- set Android time to error larger than 5 s but less than 2 minutes
- Settings — System — Date & time — Set time automatically: On
- Android should adjust time to within 200 ms
- if this fails, wait 18 hours and try again
.
Android time error can be verified via
- adb: compare
date -In(capital-i) to host time - app: comparing gps fix to Android time
- app: comparing ntp or other Internet time source to Android time
.
Check for Android time-correction events using adb:
adb logcat -d --format=printable,uid,usec,year | grep android.intent.action.TIME_SET
2025年01月25日 09:23:00.036705 1000 1802 1802 D ConditionProviders.SCP: onReceive android.intent.action.TIME_SET
.
Boot timestamps from android has accuracy of ±10 s
.
Kotlin and app processing introduces an additional 1.001 ms error, but cannot improve on Android’s built-in ±10 s error
By coaxing Android to correct its time, a boot timestamp error of ±200 ms is attainable
If boot timestamp is read via adb or other low-jitter and latency connection, both boot timestamp and Android time error can be read providing and accuracy of possibly ±10 ms
.
- Boot time depends on the time error of Android’s device clock
- Every time Android time is adjusted, reported boot-time changes
- Dumb Google allows Android time to vary ±5 s meaning any timestamp from Android is ±10 s
- Time can only be adjusted by Android system app or app signed by Google
- Android built-in time correction is only to within ±200 ms
.
The way to adjust time on Android when off by too much:
- with Internet available Settings — System — Date & time — Set time automatically: Off
- set Android time to error larger than 5 s but less than 2 minutes
- Settings — System — Date & time — Set time automatically: On
- Android should adjust time to within 200 ms
- if this fails, wait 18 hours and try again
.
Android time error can be verified via
- adb: compare
date -In(capital-i) to host time - app: comparing gps fix to Android time
- app: comparing ntp or other Internet time source to Android time
.
Check for Android time-correction events using adb:
adb logcat -d --format=printable,uid,usec,year | grep android.intent.action.TIME_SET
2025年01月25日 09:23:00.036705 1000 1802 1802 D ConditionProviders.SCP: onReceive android.intent.action.TIME_SET
.
Boot timestamps from android has accuracy of ±10 s
.
Kotlin and app processing introduces an additional 1.001 ms error, but cannot improve on Android’s built-in ±10 s error
By coaxing Android to correct its time, a boot timestamp error of ±200 ms is attainable
.
- Boot time depends on the time error of Android’s device clock
- Every time Android time is adjusted, reported boot-time changes
- Dumb Google allows Android time to vary ±5 s meaning any timestamp from Android is ±10 s
- Time can only be adjusted by Android system app or app signed by Google
- Android built-in time correction is only to within ±200 ms
.
The way to adjust time on Android when off by too much:
- with Internet available Settings — System — Date & time — Set time automatically: Off
- set Android time to error larger than 5 s but less than 2 minutes
- Settings — System — Date & time — Set time automatically: On
- Android should adjust time to within 200 ms
- if this fails, wait 18 hours and try again
.
Android time error can be verified via
- adb: compare
date -In(capital-i) to host time - app: comparing gps fix to Android time
- app: comparing ntp or other Internet time source to Android time
.
Check for Android time-correction events using adb:
adb logcat -d --format=printable,uid,usec,year | grep android.intent.action.TIME_SET
2025年01月25日 09:23:00.036705 1000 1802 1802 D ConditionProviders.SCP: onReceive android.intent.action.TIME_SET
.
- Boot time depends on the time error of Android’s device clock
- Every time Android time is adjusted, reported boot-time changes
- Dumb Google allows Android time to vary ±5 s meaning any timestamp from Android is ±10 s
- Time can only be adjusted by Android system app or app signed by Google
- Android built-in time correction is only to within ±200 ms
.
The way to adjust time on Android when off by too much:
- with Internet available Settings — System — Date & time — Set time automatically: Off
- set Android time to error larger than 5 s but less than 2 minutes
- Settings — System — Date & time — Set time automatically: On
- Android should adjust time to within 200 ms
- if this fails, wait 18 hours and try again
.
Android time error can be verified via
- adb: compare
date -In(capital-i) to host time - app: comparing gps fix to Android time
- app: comparing ntp or other Internet time source to Android time
.
Check for Android time-correction events using adb:
adb logcat -d --format=printable,uid,usec,year | grep android.intent.action.TIME_SET
2025年01月25日 09:23:00.036705 1000 1802 1802 D ConditionProviders.SCP: onReceive android.intent.action.TIME_SET
.
Boot timestamps from android has accuracy of ±10 s
.
Kotlin and app processing introduces an additional 1.001 ms error, but cannot improve on Android’s built-in ±10 s error
By coaxing Android to correct its time, a boot timestamp error of ±200 ms is attainable
.
- Boot time depends on the time error of Android’s device clock
- Every time Android time is adjusted, reported boot-time changes
- Dumb Google allows Android time to vary ±5 s meaning any timestamp from Android is ±10 s
- Time can only be adjusted by Android system app or app signed by Google
- Android built-in time correction is only to within ±200 ms
.
The way to adjust time on Android when off by too much:
- with Internet available Settings — System — Date & time — Set time automatically: Off
- set Android time to error larger than 5 s but less than 2 minutes
- Settings — System — Date & time — Set time automatically: On
- Android should adjust time to within 200 ms
- if this fails, wait 18 hours and try again
.
Android time error can be verified via
- adb: compare
date -In(capital-i) to host time - app: comparing gps fix to Android time
- app: comparing ntp or other Internet time source to Android time
.
Check for Android time-correction events using adb:
adb logcat -d --format=printable,uid,usec,year | grep android.intent.action.TIME_SET
2025年01月25日 09:23:00.036705 1000 1802 1802 D ConditionProviders.SCP: onReceive android.intent.action.TIME_SET
.
- Boot time depends on the time error of Android’s device clock
- Every time Android time is adjusted, reported boot-time changes
- Dumb Google allows Android time to vary ±5 s meaning any timestamp from Android is ±10 s
- Time can only be adjusted by Android system app or app signed by Google
- Android built-in time correction is only to within ±200 ms
.
The way to adjust time on Android when off by too much:
- with Internet available Settings — System — Date & time — Set time automatically: Off
- set Android time to error larger than 5 s but less than 2 minutes
- Settings — System — Date & time — Set time automatically: On
- Android should adjust time to within 200 ms
- if this fails, wait 18 hours and try again
.
Android time error can be verified via
- adb: compare
date -In(capital-i) to host time - app: comparing gps fix to Android time
- app: comparing ntp or other Internet time source to Android time
.
Check for Android time-correction events using adb:
adb logcat -d --format=printable,uid,usec,year | grep android.intent.action.TIME_SET
2025年01月25日 09:23:00.036705 1000 1802 1802 D ConditionProviders.SCP: onReceive android.intent.action.TIME_SET
.
- Boot time depends on the time error of Android’s device clock
- Every time Android time is adjusted, reported boot-time changes
- Dumb Google allows Android time to vary ±5 s meaning any timestamp from Android is ±10 s
- Time can only be adjusted by Android system app or app signed by Google
- Android built-in time correction is only to within ±200 ms
.
The way to adjust time on Android when off by too much:
- with Internet available Settings — System — Date & time — Set time automatically: Off
- set Android time to error larger than 5 s but less than 2 minutes
- Settings — System — Date & time — Set time automatically: On
- Android should adjust time to within 200 ms
- if this fails, wait 18 hours and try again
.
Android time error can be verified via
- adb: compare
date -In(capital-i) to host time - app: comparing gps fix to Android time
- app: comparing ntp or other Internet time source to Android time
.
- Boot time depends on the time error of Android’s device clock
- Every time Android time is adjusted, reported boot-time changes
- Dumb Google allows Android time to vary ±5 s meaning any timestamp from Android is ±10 s
- Time can only be adjusted by Android system app or app signed by Google
- Android built-in time correction is only to within ±200 ms
.
The way to adjust time on Android when off by too much:
- with Internet available Settings — System — Date & time — Set time automatically: Off
- set Android time to error larger than 5 s but less than 2 minutes
- Settings — System — Date & time — Set time automatically: On
- Android should adjust time to within 200 ms
- if this fails, wait 18 hours and try again
.
Android time error can be verified via
- adb: compare
date -In(capital-i) to host time - app: comparing gps fix to Android time
- app: comparing ntp or other Internet time source to Android time
.
Check for Android time-correction events using adb:
adb logcat -d --format=printable,uid,usec,year | grep android.intent.action.TIME_SET
2025年01月25日 09:23:00.036705 1000 1802 1802 D ConditionProviders.SCP: onReceive android.intent.action.TIME_SET