[gpsd-users] missing EPX and EPY, why?

[Christopher Story]

Can someone detail why I’m not seeing EPX and EPY in the TPV report?  or a link 
to documents that explain it.

Im implementing a multiple satellite auto acquisition and tracking system and i 
need to know the confidence of the Lat/lon I’m getting…  

I can get it from mode i assume, but id like something more definitive..


thanks...

Chris


"{\"class\":\"VERSION\",\"release\":\"3.11\",\"rev\":\"3.11-3\",\"proto_major\":3,\"proto_minor\":9}\r\n"


"{\"class\":\"DEVICES\",\"devices\":[{\"class\":\"DEVICE\",\"path\":\"/dev/ttyAMA0\",\"driver\":\"Furuno
 Electric 
GH-79L4\",\"activated\":\"2017-02-07T21:11:42.312Z\",\"flags\":1,\"native\":0,\"bps\":4800,\"parity\":\"N\",\"stopbits\":1,\"cycle\":1.00}]}\r\n"


"{\"class\":\"WATCH\",\"enable\":true,\"json\":true,\"nmea\":false,\"raw\":0,\"scaled\":false,\"timing\":false,\"split24\":false,\"pps\":false}\r\n"


"{\"class\":\"SKY\",\"tag\":\"GSV\",\"device\":\"/dev/ttyAMA0\",\"satellites\":[{\"PRN\":3,\"el\":43,\"az\":244,\"ss\":41,\"used\":false},{\"PRN\":9,\"el\":10,\"az\":313,\"ss\":31,\"used\":false},{\"PRN\":14,\"el\":25,\"az\":122,\"ss\":42,\"used\":false},{\"PRN\":16,\"el\":83,\"az\":169,\"ss\":37,\"used\":false},{\"PRN\":22,\"el\":37,\"az\":220,\"ss\":39,\"used\":false},{\"PRN\":23,\"el\":47,\"az\":317,\"ss\":40,\"used\":false},{\"PRN\":26,\"el\":61,\"az\":46,\"ss\":53,\"used\":false},{\"PRN\":27,\"el\":20,\"az\":154,\"ss\":33,\"used\":false},{\"PRN\":29,\"el\":5,\"az\":38,\"ss\":31,\"used\":false},{\"PRN\":31,\"el\":27,\"az\":63,\"ss\":47,\"used\":false}]}\r\n"


"{\"class\":\"TPV\",\"tag\":\"GGA\",\"device\":\"/dev/ttyAMA0\",\"mode\":3,\"time\":\"2017-02-07T21:11:44.000Z\",\"ept\":0.005,\"lat\":33.423478333,\"lon\":-86.731648333,\"alt\":204.400,\"speed\":0.000,\"climb\":0.000}\r\n"