山歩き
 
GPSMAP64s(英語版)のみちびき捕捉について

2018年1月13日 gpsmap64s、FLEAZ Queで、PRN195番を捕捉。
ウォーキング中にみちびきの捕捉をしてきたが、本日初めてPRN195番を捕捉。
しかし、gpsmap64sの精度3mに変わりはない。

2017年12月1日 ver500 にアップデート
Changes made from version 4.80 to 5.00(ver490はGarminHPで削除されている)
Fixed potential GPS issue
(ver500では、みちびきの捕捉に変化はない。Zenfone3 LaserではPRN195番を捕捉している)

2017年11月19日 ver490 にアップデート
Changes made from version 4.80 to 4.90
Fixed potential GPS issue(GPS潜在的な問題を修正しました)」
その日の夕方からはじめて、みちびき2号機(QZS−2)、PRN194番を捕捉。
 
GPSMAP64s スクリーンショット(2018/1/13)
 
AndroiTS GPS Test スクリーンショット(2018/1/13)
    時刻(UTC 062236)
15時22分36秒
 
AndroiTS GPS Test スクリーンショット(2018/1/13 15時22分35-36-37秒)
のときのNMEA(GPSLogger ver90による)
1月13日のGPS Test および AndroiTS GPS Testのスクリーンショット
GPS Test GPS Test AndroiTS GPS Test
 
 
 
GPSMAP64s スクリーンショット(2017/11/19)
     
 
GPSMAP64s スクリーンショット(2017/11/20)
 
GPSMAP64sのNMEA(2017/11/19)

GPSMAP64sの衛星捕捉画面では、みちびきのPRN193、194が表示されるが、
その時のNMEAは、下記赤線のように3桁のためオーバーフローして表示されない。
オーバーフローした衛星番号の後に($GPGSV)、衛星仰角、衛星方位角、信号強度は表示される。
どのような仕組みで衛星捕捉画面ではPRN番号が表示されるのかわからない。
FLEAZ Que(アプリ GPSFox)のNMEA(2017/11/19)

同時間帯のスマホで捕捉されたみちびきのPRN193,194のNMEA、$GPGSVの値を比較した。
GPSMAP64s英語版がみちびき1号機、2号機を捕捉していることが分かるが、
測位精度はみちびき捕捉前と変わらない。
 
 
 
 
 
 
 
GPSMAP64s(英語版)のバージョン履歴

GPSMAP 64 (WebUpdater) software version 5.00
as of November 28, 2017

GPSMAP 64 (WebUpdater) software version 4.90
as of November 10, 2017

Change History

Changes made from version 4.80 to 5.00:
Fixed potential GPS issue

Changes made from version 4.80 to 4.90:
Fixed potential GPS issue.

Changes made from version 4.70 to 4.80:
Fixed possible issue where a Live Track on would only show a single coordinate on the map.
Fixed issue preventing 500 custom maps to be loaded.
Fixed issue where archived tracks could not be loaded from the calendar.

Changes made from version 4.50 to 4.70:
Fixed issue where the compass wouldn't work when the bike sensor was on.
Fixed issue where track portions were being saved incorrectly.

Changes made from version 4.30 to 4.50:
Added support for optional MTP interface mode (Setup > System > Interface)

Changes made from version 4.20 to 4.30:
Added support for Bike Speed Sensor
Added support for Bike Cadence Sensor

Changes made from version 4.00 to 4.20:
Improved Bluetooth pairing.
Fixed importing adventures from SD cards.
Fixed possible routing crash.

Changes made from version 3.90 to 4.00:
Improved 'Save Portion' track feature. When saving a portion, the device now remembers that position in the track log so it can be used as a track segment for future portion saving.
Fixed possible erroneous track point on power on.
Fixed formatting issue with certain map names in the map information list.
Fixed output of SNR in $GPGSV NMEA sentence.

Changes made from version 3.70 to 3.90:
Improved map load times
Fixed possible shutdown when scrolling through the waypoints list

Changes made from version 3.40 to 3.70:
Improved 3-axis compass performance

Changes made from version 3.20 to 3.40:
Fixed shutdown on charging page when PAGE or QUIT buttons are pressed
Fixed possible shutdown in when reviewing a route in Russian
Fixed device not reconnecting to a tempe wireless temperature sensor across a power cycle
Fixed several track distance statistic issues
Fixed waypoint distances being listed incorrectly for Waypoint Averaging

Changes made from version 3.10 to 3.20:
Improved cartography support (Garmin Hunt View maps)
Improved boot time when a large amount of BirdsEye satellite imagery is present

Changes made from version 3.00 to 3.10:
Fixed issue with power off pressure trending (64s/64st models).

Changes made from version 2.90 to 3.00:
Fixed issue with geocaching 'Next Stage' feature.
Fixed potential issue with geocache filters.

Changes made from version 2.80 to 2.90:
Added support for Android version of Garmin Connect Mobile app (for LiveTrack).
Improved 3-axis compass performance.
Fixed missing 'AA Battery Type' option when not using the optional rechargeable battery pack in Setup > System. This only affected the standard (yellow) GPSMAP 64 model.
Fixed issue with barometer when auto calibration is turned off.
Fixed missing ascent, descent, and elevation statistics when reviewing certain tracks.
Fixed possible shutdown when using custom waypoint symbols.
Fixed possible shutdown when displaying the option menu in Czech.

Changes made from version 2.60 to 2.80:
Fixed freeze when 'Geocaches' is present in the page sequence

Changes made from version 2.50 to 2.60:
Fixed issue causing possible slow boot times

Changes made from version 2.40 to 2.50:
Improved average ascent and average descent data fields
Improved vertical speed and grade data fields
Improved transfer speed between device and BaseCamp Mobile or Garmin Connect Mobile (64s/64st models)
Fixed potential issue when programming a chirp (64s/64st models)
Fixed potential shutdown when using smart notifications
Fixed displaying duplicate smart notifications in certain instances

Changes made from version 2.20 to 2.40:
Added support for additional ActiveRouting cartography
Improved display of marine-specific lines in BlueChart g2 maps

 
 
 
日本版GPS「みちびき」

秘密コード≠ナ米軍支援か

 ミサイル誘導など妨害電波時の予備
  
(「しんぶん赤旗」2018年11月11日)