diff --git a/apriltag_imu/sim/README.md b/apriltag_imu/sim/README.md
index e34ed10b3d3d12dd04906b717cf1a416b3292ae6..292b341cb582d8d912bf8f3c9afe51abd2844ef6 100644
--- a/apriltag_imu/sim/README.md
+++ b/apriltag_imu/sim/README.md
@@ -2,13 +2,13 @@
 
 - **circle.bag:** Flat circle in Z plane without rotation. IMU without noise and not biased.
 
-- **circleRotX.bag:** Flat circle in Z plane with small rotation around X. IMU without noise and not biased.
+- **circleRotX.bag:** Flat circle in Z plane with small rotations. IMU without noise and not biased.
 
 - **wave.bag:** Bended circle with sinusoidal translation in Z without rotation. IMU without noise and not biased. (old name circleXYZ.bag)
 
-- **wave_noise_biasY.bag:** Bended circle with sinusoidal translation in Z without rotation. IMU with noise and biased only on Y axis (accel. and gyro.). (old name everythingBiasedX.bag)
+- **waveRot_noise_biasY.bag:** Bended circle with sinusoidal translation in Z with small rotations. IMU with noise and biased only on Y axis (accel. and gyro.). (old name everythingBiasedX.bag)
 
-- **wave_noise_bias.bag:** Bended circle with sinusoidal translation in Z without rotation. IMU with noise and biased. (old name everything.bag)
+- **waveRot_noise_bias.bag:** Bended circle with sinusoidal translation in Z with small rotations. IMU with noise and biased. (old name everything.bag)