| case 0x80: | |
| /* some proprietary system seen in the wild in Spain, Itlay and France | |
| * some speculate it's either from DAMM or SEPURA */ | |
| m=12; unk_flags=bits_to_uint(bits+n,m); n=n+m; /* skip some unknown part */ | |
| m=24; loc_lattitude=bits_to_uint(bits+n,m); n=n+m; | |
| m=24; loc_longtitude=bits_to_uint(bits+n,m); n=n+m; | |
| /* i didn't figure out yet what the other bits mean yet */ | |
| if (loc_lattitude&(1<<23)) { | |
| lattitude=(((1<<24)-loc_lattitude)*180.0)/(1.0*(1<<24)); latdir='S'; | |
| } else | |
| { | |
| lattitude=(loc_lattitude*180.0)/(1.0*(1<<24)); latdir='N'; | |
| } | |
| if (loc_longtitude&(1<<23)) { | |
| longtitude=(((1<<24)-loc_longtitude)*360.0)/(1.0*(1<<24)); londir='W'; | |
| } else | |
| { | |
| longtitude=(loc_longtitude*360.0)/(1.0*(1<<24)); londir='E'; | |
| } | |
| if ((lattitude==90)&&(longtitude==0)) is_invalid=1; | |
| if ((lattitude==0)&&(longtitude==0)) is_invalid=1; | |
| snprintf(out,outlen,"PROPRIETARY_0x80 %sunknown_flags:0x%4.4x lat:%.6f%c lon:%.6f%c",is_invalid?"INVALID_POSITION ":"",unk_flags,lattitude,latdir,longtitude,londir); | |
| dump=0; | |
| break; | |
| default: | |
| snprintf(out,outlen,"proprietary coding scheme 0x%2.2x: ",locsystem_coding_scheme); outlen=outlen-33; | |
| } |
If you have an IQ sample of a few of these 0x80 'Simple_location_system' occurring, I could probably look into adding it.
Hello. I have the same data than the user Yorch (but most likely from another location):
Both use "User defined (128 = unknown data)" so implementing for one won't work for the other.
You should be able to get the idea of creating the samples by reading the post here and here.
Hello and thanks for your response. Since both are User defined 128, can't you diferentiate them by their lenght? (one is 81, other 88). In my case, all of the PDUs ends with 8 zeros, so perhaps those can be discarded and are the same as 81?.
I lost interest but one of the authors have develop a version with separate user files in there own root folder :/tetra/data/UserDefine128.txt, UserDefine81.txt, UserDefine88.txt etc etc. You as user where able to edit there own "UserDefined" string or key in these files. TTT or Tetra decoder or other program was handling that or those files and show the "UserDefine string" in the output like dates or time stamp or whatever editted inside these files (ASCII or binair or any other code). There be also one version who did some small compiling the binairy output to limited text out.
hallo ich brauche mal hilfe TTT download ich finde nicht den richtigen link für den download der letzten version.
SSI:1050553 D_SDS_Data Party_SSI:1050100 Type:UDT-4 Length:81 Protocol:Simple_location_system LocationSystemCodingScheme:User defined (128 = unknown data) TEXT:'Undefined_protocol' DATA:'01100001011100110101111100011011100111111111001100001000000011110'
