I am currently doing my thesis on FSO, to calculate the weather attenuation I need the FOG and visibility data of Bangladesh.
Ideally, I need historical fog and visibility data for Bangladesh. While I found the Bangladesh Meteorological Department (BMD) offers data, the cost seems quite high for a student project at this stage.
Does anyone have experience or know of freely available resources for fog and visibility data in Bangladesh? Any suggestions on alternative sources or data collection methods would be greatly appreciated.