Professional Surveying Space Weather Report

Overall Threat Level

MODERATE

Confidence Level

HIGH

Solar Activity

LOW

Parameter	Value
Solar Flux (10.7cm)	113 sfu (forecast for 17 Jun)
Active Regions	4 numbered regions; Region 4465 is the most active, with beta-gamma magnetic complexity
Flare Probability	M-class: 15%, X-class: 1%

Geomagnetic Activity

UNSETTLED

Parameter	Value
Kp Index	3-4 (max 4.00, no G1 storm expected)
Planetary A Index	10-15 (A_p forecast through 19 Jun)

Graph Statistics

Parameter	Value
Data Points	337
Period	2026-07-27 23:30 UTC to 2026-08-03 23:30 UTC
Max Hp30	6.00
Max ap30	80 nT

Activity Levels

Positioning Accuracy

MODERATE Risk

Affected Regions: High-latitude geomagnetic regions (>55 degrees), Long RTK baselines (>30 km)

Expected Impact: Minor ionospheric delay and scintillation, with occasional RTK ambiguity resets; fixed solutions are likely but may require more time.

Accuracy Degradation: 2-5 cm degradation in high-latitude/long-baseline operations; typically <2 cm for shorter mid-latitude baselines.

RTK GNSS Performance

MODERATE impact; baselines under 20 km remain reliable, while longer baselines may experience more intermittent fixed solutions.

Initialization Time: RTK initialization likely 1-3 minutes; occasional >3 minute delays in active ionospheric conditions.

Network RTK Stability: Network RTK remains generally stable, though correction age may increase during local disturbances; use dual-frequency/multi-constellation receivers.

Survey Operations

Recommended Methods:

• RTK with baseline lengths limited to 15-20 km
• Network RTK using atmospheric corrections
• Static or PPK for high-precision control points

Session Duration: Increase static occupation times by 50% if Kp reaches 4; plan for 15-30 extra minutes per RTK session to account for re-initialization.

Quality Control:

• Use dual-frequency/multi-constellation receivers with ionospheric correction enabled
• Monitor baseline residuals and RTK fixed status
• Re-observe critical points when conditions change
• Record PDOP and satellite geometry during each session

Immediate Actions

• Check current Kp forecast before field mobilization
• Keep RTK baselines under 20 km where possible
• Use network RTK or PPP-RTK services to mitigate ionospheric errors

Survey Planning

• Schedule high-accuracy stakeout for periods with Kp below 4
• Allow extra time for RTK initialization and potential restarts
• Use static or PPK methods for control networks if Kp remains elevated

Equipment Considerations

• Enable multi-constellation and ionospheric correction features
• Use ground-plane or choke-ring antennas for better multipath rejection
• Verify correction link stability and data quality before starting

Field Crew Guidance

• If fixed solution is not achieved within 3 minutes, re-initialize at a new location
• Document any dropped fixes and re-observe affected points
• Avoid critical observations during local afternoon ionospheric peak, if possible