You may also want to consider checking the barometric altimeter ports on your ELEMNT, BOLT, and ROAM and other solutions offered in the ELEMNT Data Accuracy article.“We’ve spent 10 years learning what it takes to build the best bike route planner. Pairing a speed sensor like the Wahoo Blue SC or RPM Speed to your ELEMNT, BOLT, and ROAM can correct GPS inaccuracies and improve elevation and grade data when under tree/building cover or wherever GPS is unavailable. Since the ELEMNT, BOLT, and ROAM needs good a GPS signal to achieve maximum accuracy, starting a ride after gaining full line of sight to the sky and acquiring a solid GPS connection ensures the best results. This ensures the ELEMNT/BOLT/ROAM provides the most consistent and accurate elevation of any cycling computer currently available. īy using multiple factors to calculate elevation, discrepancies can be resolved when the weather stabilizes or when accurate GPS data becomes available. All devices calculating elevation with a barometric altimeter face these challenges. However, these situations are unusual, occurring only when numerous environmental factors conspire with GPS signal issues. On the rare occasion where barometric altimeter elevation drift cannot be corrected with GPS data, elevation accuracy may be skewed. Some computers use either altimeter data or GPS data as the sole source of elevation data, despite the flaws in each of these outlined above. Using altimeter elevation and correcting drift with GPS data is the best way to provide consistent and accurate data. How do ELEMNT, BOLT, and ROAM elevation readings compare with other GPS bike computers? Clogged or obstructed barometric altimeter ports.Riding in or near inclement weather like rain and snow.Large changes in temperature or humidity like stepping outdoors in the summer from an air-conditioned environment.Since the ELEMNT, BOLT, and ROAM uses GPS and barometric pressure to calculate elevation, these situations are likely to impact elevation readings: What situations impact elevation data most? This prevents skewing elevation data with poor GPS data, but also means that certain situations may also prevent the ELEMNT, BOLT, and ROAM from correcting barometric altimeter drift with GPS. If GPS elevation is deemed inaccurate, it is discarded and no adjustment is made. Before this is done however, the ELEMNT, BOLT, and ROAM performs additional calculations to determine GPS elevation accuracy. If a discrepancy is found with the barometric altimeter elevation, the ELEMNT, BOLT, and ROAM adjusts using GPS data. When a ride starts, the ELEMNT, BOLT, and ROAM calculates elevation using the barometric altimeter and compares it to the reported GPS elevation. How do the ELEMNT, BOLT, and ROAM use GPS to adjust elevation? Because of this, consistent and accurate elevation data is best achieved using GPS-adjusted barometric altimeter data. In testing, we commonly found GPS elevation inaccuracies in hundreds of meters. GPS elevation is often unreliable due to GPS satellite positioning and coverage. Why don’t the ELEMNT, BOLT, and ROAM primarily use GPS to calculate elevation? For this, the ELEMNT, BOLT, and ROAM uses GPS. To counter environmental elevation drift, barometric altimeters require regular adjustment. As with all barometric altimeters, environment changes can cause elevation readings to "drift," even when stationary or riding at on a level path. While air pressure typically provides very accurate elevation measurements, it remains subject to factors like temperature and changing weather patterns. The ELEMNT, BOLT, and ROAM primarily calculates elevation data from a barometric altimeter which measures air pressure. How do the ELEMNT, BOLT, and ROAM calculate elevation?
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