AI visibility · JS-08 · JS-02P · ST-01

Measure the whole field.

Beyond point measurement — the spatial distribution of visibility

Estimates the atmospheric extinction coefficient (σ) from dedicated-camera video to derive the meteorological optical range (MOR) at many points and in many directions — through to fog detection and visibility nowcasting

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17+
Public institutions
360°JS-08
directions observed at once
6h
JS-08 visibility nowcasting horizon
1 : 10
Gochang intercomparison — one ST-01 alongside 10 leading visibility sensors

Lineup

AI visibility meters and AI automatic weather station

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360° AI visibility · Innovative Product

JS-08

Visibility in every direction from a single unit

AI omnidirectional visibility meter. Four cameras observe visibility in 8 directions at once, deriving prevailing visibility and nowcasting up to 6 hours ahead. Designated Innovative Product No. 2025-186 by the Ministry of SMEs and Startups

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JS-08 AI omnidirectional visibility meter — product photo

Road visibility · Edge AI

ST-01

Road visibility meter · visibility computed at the edge (on-device)

AI vision visibility meter for roads. Observes visibility along a road section in one direction from 10 m to 60 km with one camera, logged to CSV with evidence images

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ST-01 edge AI road visibility meter — product photo

AI weather station · Innovative Product

JS-02P

Visibility and weather — six elements in one unit

AI automatic weather station (AWS). Video-based visibility combined with temperature, relative humidity, wind direction, wind speed and pressure, delivered with the observation images. PPS Innovative Product No. 2021-092

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JS-02P AI automatic weather station — product photo

Case studies

Already at work.

Visibility observation at airports, forest aviation, bridges, drone sites, maritime traffic control, roads and dams

JS-08 AI omnidirectional visibility meter on the roof of the Seoul Forest Aviation Office, Korea Forest Service

KOREA FOREST SERVICE · JS-08 · 2026

Visibility for forest aviation, in every direction

Omnidirectional visibility observation for forest aircraft flight decisions at the Seoul Forest Aviation Office, Korea Forest Service

JS-08 AI omnidirectional visibility meter with wire reinforcement on the railing of Hwatae Bridge, Yeosu

YEOSU HWATAE BRIDGE · JS-08 · 2026

Sea fog on the bridge, read from four cameras

Sea fog and 8-direction visibility observation on the sea crossing of Hwatae Bridge, Yeosu

JS-08 AI omnidirectional visibility meter with high-wind wire tie-downs on the railing of Dunbyeong Bridge, Yeosu

YEOSU DUNBYEONG BRIDGE · JS-08 · 2026

Built for the wind, measuring every direction

Installed with wind reinforcement on the high-wind section of Dunbyeong Bridge, Yeosu, for 8-direction visibility observation

Visibility meter beside the runway at Incheon International Airport, and the control screen

INCHEON AIRPORT · AVIATION

Runway visibility, watched around the clock

Continuous visibility observation around the runways of Incheon International Airport

AI visibility meter camera on a bridge pylon, and the bridge deck

NATIONAL INFRASTRUCTURE · BRIDGE

Fog on the bridge, seen before drivers meet it

Real-time monitoring of fog and visibility on bridges that are part of national infrastructure

Container control post and visibility meter camera at a drone takeoff and landing site

DAEJEON TECHNOPARK · DRONE

Go or no-go for a drone flight zone

Visibility-based data for go/no-go flight decisions at a drone takeoff and landing site

Rooftop camera and control room screen at the Busan Vessel Traffic Service center

BUSAN COAST GUARD · VTS

Harbour visibility for vessel traffic control

Sea fog and visibility observation across the waters controlled by the Busan Coast Guard VTS (vessel traffic service)

Expressway roadside visibility meter camera and on-site analysis equipment

KOREA EXPRESSWAY · ROAD

Low-visibility warnings on the expressway

Visibility and weather observation on fog-prone sections of Korea Expressway Corporation expressways

Camera installed at a dam facility, and on-site installation work

K-WATER · DAM

Watching the dam, whatever the weather

Safety observation at K-water dam facilities

Nationwide

Installation sites across Korea

Incheon Airport · Gimpo Airport · Daesan Port · Gyeongnyeolbiyeoldo · Ulleungdo · Uiseong, Gyeongbuk · Gochang, Jeonbuk · Jeonjucheon Bridge · Wonju (Korea Forest Service) · Hwatae Bridge · Dunbyeong Bridge · Imja 1 Bridge · Noryang Bridge (Namhae · Hadong) · Yeongdo, Busan (KHOA) · Busan (Coast Guard) · Jeju (Hwasun Police Station) · Seogwipo, Jeju

Field photos

Site photos

Hwatae Bridge, Yeosu — full view of the JS-08 railing mount — **Hwatae Bridge, Yeosu**JS-08 railing mount

Hwatae Bridge, Yeosu — JS-08 visibility observation on the bridge — **Hwatae Bridge, Yeosu**Bridge visibility observation

Dunbyeong Bridge, Yeosu — JS-08 bridge observation — **Dunbyeong Bridge, Yeosu**JS-08 bridge observation · high-wind tie-downs

Incheon International Airport — JS-08 at the rooftop observation site — **Incheon International Airport**Rooftop observation site

Korea Hydrographic and Oceanographic Agency — port visibility observation — **Korea Hydrographic and Oceanographic Agency**Port visibility observation

Uzbekistan Hydrometeorological Service — overseas installation — **Uzbekistan Hydrometeorological Service**Overseas installation

Daesan Port — coastal observation site — **Daesan Port**Coastal observation site

Ulleungdo — observation site — **Ulleungdo**Observation site

Jeju — coastal observation site installation — **Jeju**Coastal observation site installation

On-site monitor — real-time visibility and weather display — **On-site monitor**Real-time visibility and weather display

The choice of 17+ public institutions

Incheon International Airport
Korea Forest Service
Korea Expressway Corporation
K-water
Busan Coast Guard
Korea Hydrographic and Oceanographic Agency
Daejeon Technopark
Uzbekistan Hydrometeorological Service

How it works

From image acquisition to nowcasting — all processed on the edge device

01 · CAPTURE
Capture
Dedicated camera captures the visibility targets
02 · ANALYZE
Analysis
Atmospheric extinction coefficient (σ) estimated from target luminance contrast. Processed on the edge device
03 · MEASURE
Measure
Meteorological optical range (MOR) at many points and in many directions at once
04 · FORECAST
Forecast
Nowcasting from the visibility time series — a core function
05 · ALERT
Alerts
Early warning before the low-visibility threshold is reached
06 · RECORD
Record
Readings and evidence images stored together

EXISTING METERSMeasure only the scattering in a small sampling volume in front of the sensor. Only numbers remain, limiting spatial representativeness and later verification

SIJUNGObserves visibility as a spatial distribution across the whole field of view. Verifiable with images, with early warning of visibility changes

Proof

Intercomparison at a national standard observatory

Benchmark · Gochang

Comparison test at the KMA Gochang Standard Weather Observatory

One ST-01 was installed in the same observation row as 10 leading visibility sensors, including a reference transmissometer, for intercomparison of readings under the same air at the same time. Data collection toward WMO entry is underway

R&D progress and roadmap →

3Designated Innovative Products — JS-08 (MSS No. 2025-186), JS-02P (PPS No. 2021-092) and more
11Registered patents
CECertification for the European market in progress
ENEnglish operating screen · local languages can be added

FAQ · Glossary

Frequently asked questions about visibility meters

Visibility terms

Visibility: The greatest distance at which a black object of suitable size can be recognized by day, or a light of given intensity at night (WMO definition). The basis for safety decisions in aviation, road and maritime operations
Extinction coefficient (σ): How much light weakens per unit distance through scattering and absorption by aerosols and fog droplets. The larger the value, the lower the visibility
MOR (meteorological optical range): The path length over which a parallel beam from an incandescent lamp is reduced to 5% of its original luminous flux (WMO definition). MOR ≈ 3/σ. May differ from visually observed visibility depending on lighting and background luminance
Camera-based vs forward-scatter visibility meters: Forward-scatter sensors measure the scattered light in a small sampling volume; camera-based meters measure the luminance contrast of targets in the field of view

Can it be connected to existing CCTV?

It uses dedicated cameras. To ensure measurement accuracy, the dedicated camera and analysis unit are supplied together, and target distances are surveyed and calibrated on site

Can it tell future visibility, not just the current value?

Yes. Visibility nowcasting is a core, built-in function of the SIJUNG system. Future visibility is forecast from the visibility time-series trend and used for low-visibility warning decisions

How does the measurement method differ from conventional visibility meters?

A forward-scatter sensor measures the scattered light in a small sampling volume in front of the sensor. SIJUNG estimates the extinction coefficient from the luminance contrast of targets in the image, derives visibility at many points in the field of view at once, and stores the evidence images as well

How can Korean public institutions buy it?

Products designated as PPS Innovative Products can be purchased through the KONEPS Innovation Market. Designation status for each product is provided on request

Can it be installed outside Korea?

Yes. It has been exported to the Uzbekistan Hydrometeorological Service. The operating screen is available in English, and local languages can be added

Contact

Tell us about a site that needs visibility observation

After reviewing the installation site, observation purpose and the control system to connect, our engineers propose the best model and observation setup