 So, yeah good morning everyone, my name is Rahul Chauhan, I am a software engineer in Bangalore India in a startup. So, I was selected in Google summer of code 2 time 2017 or 18 under STOS OSGO. So, my mentors was a Maasi Milano, Kannada and Milan, so I will go to the next one. So, what is the STOS 2 which is developed? So, STOS stands for that Institute Science, Della, Tera Sensor Observation Services. So, it is developed for management and provision for there is a one lake in Canton in South of Switzerland to take a data for that for discharge data for that lake things ok. So, we will come to that. So, it is a OSGO incubation project. So, it is a it is a tested in real case application in the Varvano lake where we tested this STOS 2 in for early warning system, you can say in flood early detection. You can we can use a STOS in different kinds like land planning hydrogeology, geology hydrology and geomatics. We all kind static or analysis we can do using a STOS. It is work with the GIS laser for GIS layers with water protection in John for every time every every type of analysis for related to waters and all kinds of weather instruments. So, what is the OAT and FiriWat? So, I will come. So, FiriWat FiriWat is for like Firi open source software tool for water resource management. It is developed by like it is funded by EU like or EU origin project for like boosting innovation in water ok in Europe. So, OAT like observation analysis tools it is a integrated with GIS modeling for doing a research in for hydrological hydrogeological data analysis or hydrogeological data analysis of research like in a ground water in surface water. So, it is developed in python and it ok. So, basically OAT having a two classes one is sensor classes other is method classes. In sensor classes we have a two types in we can store metadata and all kind time series data or there is a second class is a method. So, where we can use a different kinds of methods for hydrogeological data like we sampling accident filter method and integrated method or these all kind methods I implemented in my project in GSOC 2017 in STOS. STOS is a arrest VVPI so, it will come into the first. So, like I have a one data this is a welling you know so, it is like you can say temperature data. So, I did a it I did a in resampling thing I am giving a frequency I will get a new time series data using the OAT thing there is a other like there is a different types of method is a hydrograph separation methods. It will give you a two types of stream flow one is a base flow or there is a other is stream flow. So, you can you can get there what is the flood or what is the alarm you can get using the analysis of this or there is a one calculate static methods. Using this methods you can get all kind of a static of that time series the minimum max and what is the all kind quarter that all kind things. There is a hard gives methods like it is it comes for calculate the crop your transportation for using a climatological data. So, it is like you can use a data values method for in for a specific time period to count sorry remove the outside data and take the all in one data give you have to give the all the parameter. So, there is a my 2018 project STOS 3. So, what I did here I did I created a two plug-in for unit conversion inside STOS 3. One is a post-garageable unit other is a pin post-garageable unit is a extension for post-garageable data. So, what you have to do like you will get a data or you can convert all the unit inside the data base or there is a other pin this is a python library. So, using this pin python library you can convert data in other any you can say any unit.