Guide and method
Understand GNSS indicators, jamming and spoofing: read map areas, examine sources, missing data and the limits of observations.
Open mapGNSS and GPS
GNSS is the collective name for satellite navigation systems. GPS, Galileo, GLONASS and BeiDou are examples of these systems.
Jamming
Jamming disrupts signal reception. Reported quality degradation is an indicator to investigate, not a direct radio measurement of its source.
Spoofing
Spoofing presents false signals to mislead a receiver. An unusual position or trajectory alone cannot confirm it.
How to read zones and colors?
The legend explains the selected layer’s indicators. Hexagons summarize observations; their boundaries do not represent a transmitter’s range. Methods and available thresholds are documented with the sources.
Can I analyze a place and a period?
Select a location and a UTC date on the map, then open the analysis workspace. Comparisons use available archives and identify incomplete periods or methods that cannot be compared.
Is an empty zone a safe zone?
No. It may lack aircraft, receivers, measurements or archives. Absence of data does not guarantee reception.
Is it a certified navigation tool?
No. SatellAItes is an exploration and analysis tool. It does not replace certified systems, operational procedures or advice from competent authorities.
UTC, TAI and time zones on the map and globe
A discreet clock shows the current UTC date and time in the top-right corner of the map and globe. Its NTP reference is obtained server-side from METAS; network delay is compensated and an estimated precision margin is displayed. Visible milliseconds do not guarantee metrological accuracy to one millisecond.
TAI appears below UTC with its current offset: TAI − UTC = +37 s. It is derived from synchronised UTC and the official offset. UTC and TAI use the same SI second; the 0.9 s limit concerns UT1−UTC, not TAI−UTC.
Open the time-reference group in the layer menu and enable Time Zone. Fine outlines show civil time zones, including oceans, with current local times and GMT±HH:mm offsets. Daylight saving rules and half-hour or quarter-hour offsets are included. Boundaries are simplified for display and remain approximate.
Hover over a zone for a temporary tooltip; click or tap to keep a panel open with its date, local time and GMT offset. Close it with ×, Escape or an outside click. UTC/TAI clock information is also available on hover, click and keyboard: Tab, then Enter or Space.
These clocks show the current time independently of the selected analysis period. When comparing observations, retain the analysis date and UTC interval. Without a valid UTC reference, no substitute local or TAI time is invented; time-zone outlines may remain visible.