Mavros: "/ डायग्नोस्टिक्स" मावरोस से "कोई उपग्रह नहीं"

मैंने अपना ड्रोन खुले क्षेत्र में रखा और पिक्सहॉक का नेतृत्व हरा है।
मैं इस कोड को चलाने के बाद
roslaunch mavros px4.launch
और फिर मैं दौड़ता हूँ
rostopic echo -n1 /diagnostics
मैने पाया कि

name: "mavros: GPS"
    message: "No satellites"
    hardware_id: "/dev/ttyUSB0:57600"
    values: 
      - 
        key: "Satellites visible"
        value: "0"

लेकिन जब मैं qgroundcontrol और एक्जिट प्रोग्राम कनेक्ट करता हूं तो मैं मावरोस चलाता हूं और फिर से "/ डायग्नोस्टिक्स" की जांच करता हूं, मुझे जीपीएस शो मिला।

level: 0
    name: "mavros: GPS"
    message: "3D fix"
    hardware_id: "/dev/ttyUSB0:57600"
    values: 
      - 
        key: "Satellites visible"
        value: "16"
      - 
        key: "Fix type"
        value: "3"

मैं क्यूजीसी कनेक्ट किए बिना जीपीएस से मूल्य प्राप्त करना चाहता हूं। मैं यह कैसे कर सकता हूँ?

MAVROS संस्करण और मंच

मावरोस: 0.25.1
आरओएस: काइनेटिक
उबंटू: 16.04

ऑटोपायलट प्रकार और संस्करण

पीएक्स4

संस्करण: नवीनतम

निदान

header: 
  seq: 327
  stamp: 
    secs: 1527908144
    nsecs:  63593259
  frame_id: ''
status: 
  - 
    level: 0
    name: "mavros: FCU connection"
    message: "connected"
    hardware_id: "/dev/ttyUSB0:57600"
    values: 
      - 
        key: "Received packets:"
        value: "5340"
      - 
        key: "Dropped packets:"
        value: "0"
      - 
        key: "Buffer overruns:"
        value: "0"
      - 
        key: "Parse errors:"
        value: "0"
      - 
        key: "Rx sequence number:"
        value: "240"
      - 
        key: "Tx sequence number:"
        value: "141"
      - 
        key: "Rx total bytes:"
        value: "132922"
      - 
        key: "Tx total bytes:"
        value: "133365"
      - 
        key: "Rx speed:"
        value: "305.000000"
      - 
        key: "Tx speed:"
        value: "320.000000"
  - 
    level: 2
    name: "mavros: GPS"
    message: "No satellites"
    hardware_id: "/dev/ttyUSB0:57600"
    values: 
      - 
        key: "Satellites visible"
        value: "0"
      - 
        key: "Fix type"
        value: "0"
      - 
        key: "EPH (m)"
        value: "Unknown"
      - 
        key: "EPV (m)"
        value: "Unknown"
  - 
    level: 0
    name: "mavros: Heartbeat"
    message: "Normal"
    hardware_id: "/dev/ttyUSB0:57600"
    values: 
      - 
        key: "Heartbeats since startup"
        value: "415"
      - 
        key: "Frequency (Hz)"
        value: "0.960080"
      - 
        key: "Vehicle type"
        value: "Quadrotor"
      - 
        key: "Autopilot type"
        value: "ArduPilotMega / ArduCopter"
      - 
        key: "Mode"
        value: "STABILIZE"
      - 
        key: "System status"
        value: "Standby"
  - 
    level: 0
    name: "mavros: System"
    message: "Normal"
    hardware_id: "/dev/ttyUSB0:57600"
    values: 
      - 
        key: "Sensor present"
        value: "0x00000000"
      - 
        key: "Sensor enabled"
        value: "0x00000000"
      - 
        key: "Sensor helth"
        value: "0x00000000"
      - 
        key: "CPU Load (%)"
        value: "0.0"
      - 
        key: "Drop rate (%)"
        value: "0.0"
      - 
        key: "Errors comm"
        value: "0"
      - 
        key: "Errors count #1"
        value: "0"
      - 
        key: "Errors count #2"
        value: "0"
      - 
        key: "Errors count #3"
        value: "0"
      - 
        key: "Errors count #4"
        value: "0"
  - 
    level: 2
    name: "mavros: Battery"
    message: "No data"
    hardware_id: "/dev/ttyUSB0:57600"
    values: 
      - 
        key: "Voltage"
        value: "-1.00"
      - 
        key: "Current"
        value: "0.0"
      - 
        key: "Remaining"
        value: "0.0"
  - 
    level: 2
    name: "mavros: Time Sync"
    message: "No events recorded."
    hardware_id: "/dev/ttyUSB0:57600"
    values: 
      - 
        key: "Timesyncs since startup"
        value: "0"
      - 
        key: "Frequency (Hz)"
        value: "0.000000"
      - 
        key: "Last dt (ms)"
        value: "3.333722"
      - 
        key: "Mean dt (ms)"
        value: "0.000000"
      - 
        key: "Last system time (s)"
        value: "916.671332000"
      - 
        key: "Time offset (s)"
        value: "1527907227.282750130"

आईडी चेक करें

OK. I got messages from 1:1.

---
Received 165 messages, from 1 addresses
sys:comp   list of messages
  1:1     0, 111