Https://discussions.flightaware.com/t/ads-b-1090mhz-band-pass-and-antenna/18108

Indonesian Aerospace is busy to serve every national flight, this is very interesting…
during the international crisis that hit because of the impact of the pandemic that never ended.
With the visible busyness of the National Space Agency, there is a high sense of optimism to be able to move forward more in fighting the current international crisis.