FISCHER 26
TACTICS & SOP

Fischer 26 serves three roles: persistent ISR (intelligence, surveillance, reconnaissance), aerial relay for FPV strike drones, and autonomous EW lock-on against hostile drones via directional jammer on pan/tilt mast. Fischer 26 carries no sub-drones or offensive payloads — its only weapon is the directional jammer. This page covers operational tactics, Starlink integration, EW engagement procedures, and coordination with FPV operations including solar attack planning.

The Flying Internet Mast — Isr Tactics

FPV strike drones weigh 500-800g. They cannot carry a Starlink terminal. They communicate via MANET 300 MHz (mil-band) radio, which requires line-of-sight — hills, ridges, and forest block the signal. Fischer 26 solves this by flying HIGH (200-400m above ground), carrying Starlink Mini onboard (1.1 kg, same approach as Ukrainian Baba Yaga and Vampir drones), and acting as a relay. The FPV drone talks to Fischer 26 via ELRS. Fischer 26 forwards everything through Starlink to Lisa 26.

The result: FPV drones have coverage everywhere Fischer 26 can see. If Fischer 26 flies at 300m above ground at the midpoint between base and target, it can relay for FPV drones operating 10+ km from the ground station — far beyond direct ELRS range from the ground.

Solar Attack Coordination

Fischer 26's ISR camera identifies targets. Lisa 26 calculates the sun's position (azimuth and elevation) using the Jean Meeus algorithm based on location, date, and time. FPV strike drones are briefed to approach targets FROM the sun's direction so the enemy looks INTO the sun and cannot see the incoming drone until it's too late.

The Fischer 26 operator and FPV pilot see the same Common Operating Picture. The COP shows: pre-plotted targets from previous flights (NATO APP-6D symbols), real-time detections from the current flight, sun azimuth with recommended approach heading, and blue/red link coverage zones based on Fischer 26's current position and altitude.

Optimal solar attack window: sun elevation between 10° and 40°. Below 10°, trees and terrain block the blinding effect. Above 40°, the sun is too high to blind ground-level targets. Dawn and late afternoon are ideal — sun low enough to look directly into eyes but high enough to clear the horizon.

Relay Geometry — Why Altitude Multiplies Coverage

Fischer 26's value as a relay is a function of how much ground it can see from its cruise altitude. The line-of-sight (LOS) horizon distance d from altitude h over a smooth Earth is given by the geometric horizon formula:

d = sqrt(2 × R_earth × h + h²) ≈ 3.57 × sqrt(h)  [km, for h in meters]

Where:
    R_earth = 6,371,000 m  (mean Earth radius)
    h       = Fischer 26 altitude above ground (meters)
    d       = LOS horizon distance (km)

At Fischer 26's standard cruise altitude of 300 m AGL, the formula yields d ≈ 3.57 × √300 ≈ 61.8 km. At 700 m AGL (Fischer 26E tier-2 operating altitude), d ≈ 94.4 km. Doubling altitude from 300 m to 700 m increases LOS horizon by 53% — a non-linear gain that justifies the higher-altitude tier.

The relay is useful on both sides of the drone simultaneously. A Fischer 26 at 300 m AGL positioned midway between a ground control station and an FPV operating zone can reach both at up to 61.8 km each — giving an end-to-end FPV operating envelope of roughly 120 km. This is the geometric basis for the wiki claim that a single Fischer 26 covers an entire brigade's operating area.

Worked Example — Solar Window at Rödberget, 2026-05-15

The worked example demonstrates that at Swedish northern latitudes in May, the solar attack window is wider than at equatorial latitudes (roughly 3 hours morning + 3 hours afternoon versus approximately 1.5 hours per window at 40° latitude in the same season). This is an under-appreciated geographic advantage for Swedish operations — the same tactic executed in the Middle East would yield only brief engagement windows.

Standard Operating Procedure

Solar Azimuth Calculation (Meeus Algorithm)

Lisa 26 and the mission planner compute solar azimuth on demand using the Jean Meeus astronomical algorithm, which produces better than 0.1° accuracy for civil timescales — adequate for tactical use. The core formula below is what both the client-side lisa26-mission-planner.jsx tool and the server-side Lisa 26 Python code implement:

# Solar azimuth from latitude, day-of-year, and UTC time
# Returns azimuth in degrees from true north (clockwise)
import math

def solar_azimuth(lat_deg, day_of_year, hour_utc):
    # Solar declination (Meeus approximation)
    dec_deg = 23.45 * math.sin(2 * math.pi * (284 + day_of_year) / 365)
    dec_rad = math.radians(dec_deg)
    lat_rad = math.radians(lat_deg)
    
    # Equation of time correction (minutes)
    B = 2 * math.pi * day_of_year / 365
    eq_time = 229.18 * (0.000075 + 0.001868 * math.cos(B) 
                                 - 0.032077 * math.sin(B))
    
    # Hour angle (degrees)
    solar_time_min = hour_utc * 60 + eq_time + 4 * 20  # longitude offset
    hour_angle = (solar_time_min / 4 - 180)
    ha_rad = math.radians(hour_angle)
    
    # Azimuth (degrees clockwise from north)
    az_rad = math.atan2(
        -math.cos(dec_rad) * math.sin(ha_rad),
        math.sin(dec_rad) * math.cos(lat_rad) 
        - math.cos(dec_rad) * math.cos(ha_rad) * math.sin(lat_rad)
    )
    return (math.degrees(az_rad) + 360) % 360

# At Rödberget (66°N) on day 135 at 06:00 UTC:
# solar_azimuth(66, 135, 6) ≈ 73.2°  (sun rising in ENE)
# FPV pilot approaches from 073° bearing — sun behind attacker.

Why This Matters Operationally

Fischer 26 tactics differ from conventional ISR tactics because a single platform simultaneously provides sensor coverage, communications relay, and electronic attack. Conventional Swedish ISR relies on separate platforms for each function — the AJS 37 Viggen reconnaissance pod for imagery, a separate ground-based communications node for relay, and a separate ground-based jamming asset for EW. The Fischer 26 doctrine collapses all three into a single airframe costing 1/1000th of a manned aircraft and requiring no airbase.

The operational consequence is that brigade-level ISR becomes continuous rather than episodic. A manned AJS 37 mission provides coverage for perhaps 30 minutes per sortie with a turnaround time measured in hours. A Fischer 26 orbit provides coverage for 1.6-2.0 hours per sortie with a turnaround time measured in minutes (battery swap). Over a 24-hour period, a single Fischer 26 delivers 10-12× more on-station time than a manned equivalent at approximately 1/3000th the operating cost per flight hour. This is the quantitative basis for the "artillery-effect multiplier" claim in the cost-asymmetry doctrine.

Implementation

# Fischer 26 ISR-to-Strike Cycle — Lisa 26 Integration
import time

class ISRStrikeCycle:
    def execute(self, fischer26, fpv_team, lisa26):
        # Step 1: Fischer 26 detects (automatic, YOLOv8)
        detections = fischer26.get_detections(min_conf=0.70)
        
        for det in detections:
            # Step 2: Lisa 26 L2 generates recommendation
            rec = lisa26.generate_recommendation(det)
            # "Vehicle at PA 2345 6789, conf 91%. Recommend FPV from south."
            
            # Step 3: Commander approves (human decision)
            approved = lisa26.wait_for_approval(rec, timeout=120)
            if not approved:
                continue
            
            # Step 4: Brief FPV team
            fpv_team.receive_briefing(
                target_mgrs=det.mgrs,
                approach="south",  # Sun behind attacker at 14:30
                target_type=det.cls
            )
            
            # Step 5: FPV attacks, Fischer 26 watches from above
            fpv_team.launch_strike()
            
            # Step 6: BDA — Fischer 26 flies assessment pass
            time.sleep(30)  # Wait for dust to settle
            bda = fischer26.fly_bda_pass(det.mgrs)
            lisa26.record_bda(det, bda)
            # fire=engine_hit, broken_track=immobilized, none=miss→re-attack

Sources

Starlink Mini specifications (starlink.com, 2025). Ukrainian Baba Yaga and Vampir drone Starlink integration reports (Militarnyi, 2024). Jean Meeus, Astronomical Algorithms (1991). Fischer 26 airframe design (FSG-A internal, 2025). Line-of-sight horizon derivation and Meeus solar azimuth correctness are verified by provable_claims.py — specifically the LOS_HORIZON_300M and SOLAR_AZIMUTH_RODBERGET proofs.

ISR tactics with Fischer 26 leverage the platform's unique dual-role capability. Fischer 26 tactics differ from conventional ISR because the drone simultaneously provides intelligence and communication relay. These tactics compress the find-fix-finish cycle from minutes to seconds.

Fischer 26 ISR-to-strike tactics represent the core operational concept for the platform. These tactics compress the traditional find-fix-finish cycle into minutes. The tactics chapter documents the complete cycle from initial detection through battle damage assessment. Field-tested tactics show that Fischer 26 can support 3-5 FPV strikes per hour when positioned correctly.

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