# Sidereal Timing Systems > Centimetre-level GPS timing for motorsport, with nothing to set up beforehand. Start, splits and finish are virtual lines on a satellite map. One device on each car times every crossing to the millisecond and logs centimetre-level data for the driver, using corrections from one base station at the venue. No beams, loops or reruns. - Canonical URL: https://siderealtiming.com/ - Interactive live demo: https://demo.siderealtiming.com - Contact: hello@siderealtiming.com - Location: Alberta, Canada - Last updated: 2026-10 --- ## 2027 Beta Pilot: Anchored by DMS Time Trials DMS Time Trials runs StratoCross autocross and StratoSprint track sprints at Stratotech Raceway, and is deploying Sidereal for its 2027 championship season. We are onboarding a limited number of additional series into the 2027 Beta Pilot. Participating series get dedicated support and full hardware fleets. - Special 2027 pilot pricing: $25 CAD Point to Point / $35 CAD Circuit Lapping, per car per event - **Anchor partner**: DMS Time Trials - **2027 Beta Pilot**: Limited Series Slots Open - **2027 Beta Pilot rates**: 35% off - **Evaluation trial**: Free summer shadow timing trial --- ## Key highlights - **Timing accuracy**: ±1 ms — Repeatable millisecond timing with zero line drift. - **Track setup**: 0 cables — Virtual lines on a map. No tripods or buried loops. - **Driver telemetry**: 2-in-1 Bluetooth — Official transponder and driver data logger in one device. - **Live results**: Instant — On every phone before the car returns to grid. --- ## The problem: Timing shouldn't be the hardest part of the weekend Organizers and track operators choose between optical beams and in-ground loops. Some systems also use wireless, with short range and still less flexibility. All of them are hard to set up and run. ### Optical beams (Physical beam setups) - Tripods blown over by wind or clipped by cars - Long cable runs across hot paddock lanes - Morning alignment delays and sensor drift - Missed triggers in sunlight - False trips that force reruns ### Transponder loops (In-ground track loops) - Requires cutting slots into track asphalt - Permanent installation impossible on leased or temporary venues - Zero flexibility between configurations - Intermediate splits cost thousands per line ### Sidereal (No beams to align, no loops to cut) - Virtual lines drawn in software that cannot move - Extra splits cost nothing - Millisecond timing certainty with simple trackside gear - The full seasonal fleet arrives in master charging cases, and we maintain it - Every device is also a data logger, streaming 10 Hz centimetre-level data to the driver - Easy setup: put the device on the car and race --- ## How it works: Five steps, and you're off to the races 1. **Draw the course once**: Set the start, finish and splits on a satellite map. The lines never drift between events, and they can be shared to each driver's RaceChrono. 2. **Deploy the base station**: Turn on one base station under open sky. It surveys its own position and broadcasts the live corrections that give every device centimetre-level accuracy. 3. **Hand out the devices**: Mount each device on the hood, roof or trunk with strong cup magnets or lever suction cups, or clamp it to a roll cage pipe. On grid, tap a phone to the device to assign the driver. Or pre-assign drivers in race control, and the driver grabs the device with their name on the display. 4. **Run the event**: Devices work out each line crossing to the millisecond and send the times live over cellular. 5. **Marshal from the field**: Corner workers record cone penalties and track flags from their phones, with no login needed. Or one person can enter them from a phone or computer. --- ## Capabilities: No venue Wi-Fi, no lost runs Cars identify themselves at grid, results sync over cellular, and marshals report from their own phones. - **Automatic car identification (Staging)**: Pair the device with an NFC phone tap or pre-assign drivers in race control. The system knows which car crosses the line without an entry on a computer. - **2-in-1 transponder and logger (Hardware)**: Mounts with strong cup magnets, lever suction cups or roll cage pipe clamps. Scores the race while streaming 10 Hz, centimetre-level Bluetooth telemetry to driver phones. - **Cellular LTE with a global SIM (Connectivity)**: Every device carries an onboard cellular LTE modem and a global SIM with data included. No venue Wi-Fi or router to set up. - **Onboard storage (Reliability)**: Crossings save locally if cellular drops and sync automatically upon reconnection. No lost runs. - **Optional no-login field reporting (Marshalling)**: Corner marshals report cone hits and track status directly from their phone browser, with no accounts. - **Software splits (Course design)**: Place start, finish, and intermediate splits on satellite maps. Redesign your course in seconds. See live car positions on the map. --- ## Everyone sees the same thing Times reach drivers and spectators instantly. Autocross scores each driver's best run; circuit lapping runs rolling boards with pit lane filtering. - **Public live timing**: Open on any phone. PAX, classing, splits, optimal lap, top speed and CSV export. - **Deep comparisons**: Click any row to compare competitors lap by lap and sector by sector. - **Automated season points**: Points, drop weeks and tiebreakers calculate automatically according to your series rulebook. --- ## Cockpit data: An official transponder and driver data logger in one device Traditional transponders aren't a centimetre-level data logger, and a phone's built-in GPS updates at 1 Hz with limited accuracy. The Sidereal device scores the race and streams 10 Hz telemetry straight to the driver, so every driver has data to improve with. - **10 Hz centimetre-level Bluetooth Low Energy stream**: The device streams centimetre-level positioning over Bluetooth into RaceChrono, TrackAddict, and Harry's LapTimer. Competitors get driving lines and apex speeds on their own phones, without buying a standalone logger. Most are about 100 times less accurate. - **A transponder rental that gives drivers data**: Instead of paying for a passive transponder rental with no feedback, drivers get live high-rate data. Organizers can pass along the registration fee without the pushback. --- ## Where it works: Anywhere you can see the sky Originally built for motorsport, and works wherever you have open sky: tarmac, gravel, ice, water, or dirt. - Autocross - Time attack - Track days & lapping - Hillclimb & sprints - Karting - Rallycross - Motorcycles & supermoto - Powerboats & personal watercraft - Equestrian & barrel racing - Snowmobiles --- ## Reserve your season or schedule a shadow trial DMS is our anchor partner for 2027 with limited openings for other series remaining. Request a free on-track shadow timing trial for summer 2027 or reserve fleet capacity for 2028. - Email: hello@siderealtiming.com - Contact form: https://siderealtiming.com/contact