EstimatorAidSource3d (UORB message) 
c
uint64 timestamp                # time since system start (microseconds)
uint64 timestamp_sample         # the timestamp of the raw data (microseconds)
uint8 estimator_instance
uint32 device_id
uint64 time_last_fuse
float32[3] observation
float32[3] observation_variance
float32[3] innovation
float32[3] innovation_filtered
float32[3] innovation_variance
float32[3] test_ratio           # normalized innovation squared
float32[3] test_ratio_filtered  # signed filtered test ratio
bool innovation_rejected        # true if the observation has been rejected
bool fused                      # true if the sample was successfully fused
# TOPICS estimator_aid_src_ev_vel estimator_aid_src_gnss_vel estimator_aid_src_gravity estimator_aid_src_mag