diff -up ./gazebo/sensors/GaussianNoiseModel.cc.gaussianstddev ./gazebo/sensors/GaussianNoiseModel.cc
--- ./gazebo/sensors/GaussianNoiseModel.cc.gaussianstddev 2020-01-18 13:54:05.637290373 -0500
+++ ./gazebo/sensors/GaussianNoiseModel.cc 2020-01-18 13:55:36.961532289 -0500
@@ -193,8 +193,12 @@ double GaussianNoiseModel::GetBias() con
//////////////////////////////////////////////////
void GaussianNoiseModel::SampleBias()
{
- this->bias =
+ if (this->biasStdDev > 0) {
+ this->bias =
ignition::math::Rand::DblNormal(this->biasMean, this->biasStdDev);
+ } else {
+ this->bias = this->biasMean;
+ }
// With equal probability, we pick a negative bias (by convention,
// rateBiasMean should be positive, though it would work fine if
// negative).