Timing Advance ↔ Distance Calculator
Used only for NR ΔTA mode (to compute distance change from current timing).
GSM/LTE: TA steps directly. NR Absolute: TA ∈ [0..3846]. NR ΔTA: TA ∈ [0..63] (uses TA−31).
Results
TA time (variable part)
— ns
Distance uses one‑way model: d = c·TTA/2, c = 299,792,458 m/s.
© TechWindo
3GPP basis (click to expand)
- GSM: 1 TA step ≈ 3.69 μs ⇒ ≈ 550 m per step.
- LTE: 1 TA step = 16·Ts, Ts=1/30.72 MHz ⇒ ≈ 0.520833 μs ⇒ ≈ 78.125 m per step.
- NR: Tc = 1/(480 kHz·4096); NTA = TA·16·64/2^μ (Abs); ΔNTA = (TA−31)·16·64/2^μ (Adj). NTA,offset is a configuration constant (not propagation distance).
February 4, 2026