Satellite Orbit Identification in TNAP Images

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TNAP-Images
Some form of satellite identification has existed in FTA receivers for years. Satellite identification was prominently displayed in most FTA receivers that were made from 2003 to around 2010. FTA receivers from this era used binary or bin files that were updated regularly. No foolproof system existed. A lot of C band and linear Ku band satellites were identified incorrectly in FTA receivers from that era.

Loading an updated bin file into the FTA receiver allowed for the satellite information to also be updated. Updating the satellite information on a regular basis allowed the satellite identification system to be more accurate. Satellite identification in a FTA receiver is made possible by reading the transponder Network Information Table (NIT) or by checking for lock on a list of transponders that are associated with a satellite orbit location.

Professional grade satellite receivers and professional grade satellite signal meters may get the Correct Satellite Orbit and Satellite Identification by using the satellite beacon. Consumer FTA satellite receivers Do Not Have satellite beacon reception capability, so this method of satellite orbit identification is not available on consumer grade FTA satellite receivers.

The design of TNAP images recognizes the limits of satellite identification, so efforts in the various menus to identify a satellite orbit location are limited or do not exist. The Network Information Table or NIT usually works great on circular type Ku satellites, and also may work to a degree on linear Ku satellites to determine orbit location. NIT works poorly on North American C band satellites, to the point of being almost useless.

TNAP could employ the technique of Yesteryear and use transponder lock for satellite orbit location identification. The problem though is someone or a group of people would need to constantly assist in providing good transponder information to be used with satellite orbit identification. And still we would not have a foolproof satellite orbit identification system.

Recognizing the limits of satellite orbit identification, the best that can be done in TNAP for satellite orbit identification is to provide a NIT search for the satellite transponders that are found in a blindscan. We previously made available the ability to load the list of transponders that are found in blindscan into the Signal finder plugin. To complement this, a search for NIT has been added to Signal finder, but seeing the results will depend upon the skin being used.

TNAP 7 images dated after 06-10-2026 should have the Option to perform a NIT search at the end of a blindscan to determine or aid in proper satellite orbit location, and also have an automatic NIT search in the Signal finder. But once again, the ability to see the NIT search in the Signal finder plugin will depend on the skin being used.
 
The old Enigma1 respected the flag setting in satellites.xml, and the search was adjusted accordingly. Enigma2 ignores this flag.

useable flags are
0 - none
1 - Network Scan
2 - use BAT
4 - use ONIT (extended network search)
8 - skip NITs of known networks
and combinations of this.

<satellites>
<sat name="Telstar14R/19V (63.0W)" flags="2" position="-630">
...
 
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For example, with flag 2 in satellites.xml, the satellite scan in Enigma 1 created user bouquets based on the BAT broadcast on PID 17
capture_001_11062026_060313.webp
Or flag 8, which ignores the NIT if it is listed in satellites.xml
...
 
If the ONID/TID is also listed in satellites.xml, it is quite easy to determine the location based on the transponders found, since the information in the NIT is not always reliable. Yeah, I was thinking of something else - oops.
 
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