Initial Scan Data for DVB channel scan, How to get Initial DVB Scan data

Hi ,
Can anyone share the information, regarding "How initial scan data will
generate"

from "dvb-apps->utils->scan",
to scan for channels, i executed following command
"./scan dvb-s/InSat4B-80.5E"

content of InSat4B-80.5E,
1 # Insat 4B-80.5E
2 # freq pol sr fec
3 S 1000 V 27500000 AUTO
4 S 10234234 V 27500000 AUTO
5 S 11232300 V 27500000 AUTO
6 S 11213343 V 27500000 AUTO
7 S 10990000 V 27500000 AUTO
~

My question is,
who will populate this information and from where they will populate this
info.
Is there any standard transponders frequency list.

like
http://www.lyngsat.com/in4b.html

we must follow this , for tuning?



Is there any tool, which doesnt required any initial data for scanning dvb
channels?


please let me know,

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