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Week 2026 / 32 · 2026-08-03 – 2026-08-09

Week 32 (3–9 August 2026): Integrity-drop measurements (consistent with GNSS degradation)

Indicative · based on ADS-B integrity (NIC) data

Affected aircraft-hour share

%3.7

▼ 0.4 pp vs previous week

Affected aircraft-hours

7,204

/ 196,066 aircraft-hours

Events

262

262 medium/high sufficiency

Position anomalies

191

high/medium-sufficiency events

Day by day

Each day's affected aircraft-hour share (%). Peak day in dark colour.

  • 3.5
    Mon
  • 4.6
    Tue
  • 3.2
    Wed
  • 4.2
    Thu
  • 3.9
    Fri
  • 3.1
    Sat
  • 3.1
    Sun

Last 12 weeks

Weekly share; this report is the highlighted point. Weeks without data are left blank.

%3.1%5.3

Highest FIRs

Regions with enough sample during the week, by affected aircraft share.

  • Ankara%19.4
  • Damascus%13.7
  • Amman%6.5
  • Bucharest%4.1
  • Nicosia%4
  • Sofia%3.4
  • Istanbul%2.7
  • Cairo%1.8

Cell map of the peak day · 2026-08-04

Each polygon is an H3 cell; “no data” does not mean calm.

  • Insufficient data
  • Low
  • Medium
  • High

Largest event of the week

Ankara

189

2026-08-03, 00–16 UTC, 17 hours in total. The number of unique affected aircraft is shown above.

Position anomalies (spoofing) · day by day

High- and medium-sufficiency events (rule-based, focus region only); high in dark colour.

  • 20
    Mon
  • 42
    Tue
  • 25
    Wed
  • 22
    Thu
  • 43
    Fri
  • 14
    Sat
  • 25
    Sun

Findings this week

  1. In the regional scope (Türkiye and neighbours), 3.67% (7,204) of 196,066 aircraft-hours over seven days showed degraded navigation integrity; the daily rate ranged from 3.06% to 4.63%. The peak day was 4 August (4.63%), followed by 6 August (4.23%). These data do not identify the cause of any rise or fall.
  2. Share of aircraft affected by region (weekly, FIRs with sufficient observation volume): Ankara 19.4%, Damascus 13.7%, Amman 6.5%, Bucharest 4.1%, Nicosia 4.0%.
  3. The integrity-drop event affecting the most aircraft this week was on 3 August in the Ankara FIR: 189 unique aircraft, 17 hours (00–16 UTC) (event = connected medium/high-level cell-hours). All days of the week were produced with the same algorithm version (1.5.0), so the events are comparable with one another.
  4. Position anomalies (spoofing, rule-based, focus region): 191 high/medium-confidence events this week (149 high, 42 medium); busiest day 7 August (43). There are also 76 low-confidence events and 580 jumps overlapping with low integrity; jumps coinciding with integrity loss are not counted in this headline figure; the cause is not stated. Indicator only: it states no cause.
Data period, version and scope

This report was published on 15 October 2026 and rests on the published data of that day: regional scope (Türkiye and neighbours), algorithm 1.5.0 (a single affected-aircraft definition is used: a notable share of reports showing low integrity; faulty-transmitter filter applied). This report was prepared retrospectively on 15 October 2026, after the week ended: the figures show the current reprocessed series, not necessarily what would have been published at the time. Earlier weekly reports may have been prepared with a different scope or algorithm version; reports must not be compared directly. The data come from a single source (adsb.lol); areas without receivers are invisible and “no data” does not mean “calm”. It is an indicator only: it states no cause and makes no definitive detection claim.

Open on the map

This report is based on observed ADS-B data and is not an operational navigation source. See the methodology page for the general framework.