Online services actually do have the data available, just their online graphing is a smoothed out version of the data. Generally data is received every 5 secon

Online services actually do have the data available, just their online graphing is a smoothed out version of the data. Generally data is received every 5 seconds. In cases such as Lion Air, they downloaded all the granular data from nearby receivers and provided some analysis in their blog. They also made available the raw data for the public to download: https://www.flightradar24.com/blog/flightradar24-data-regarding-lion-air-flight-jt610/ https://www.flightradar24.com/blog/flightradar24-data-regard...