Operation Manual

259
9.8.11 GPS/DGPS
1. Initial setting of GPS
1. Initial setting of GPS1. Initial setting of GPS
1. Initial setting of GPS
This operation is for undertaking initial setting of GPS. The GPS receiver measures posi-
tion without initial setting but 10 or more minutes may be required after initial setting.
● Content of settings
Ship position : Approximate latitude and longitude is sufficient
Exclusion satellite : When unhealth satellite is used, precision may deteriorate.
The satellite number input here is not used for measuring the
position.
Geodetic system : Japan is "02"
Antenna height : Input the height of the antenna from the sea surface.
Fix mode : Since the height of the antenna is fix in the case of an ocean
going vessel, greater stability in position is obtained in 2D (two
dimensions).
DOP level : If only position results with high precision are intended to be
used, designate 10 or less or 5 or less.
Position average :
When variance in position needs to be minimized, select ＬＯＮＧ
ＬＯＮＧＬＯＮＧ
ＬＯＮＧ .
When response needs to be maximized select ＮＯＮＥ
ＮＯＮＥＮＯＮＥ
ＮＯＮＥ . However,
with this latter setting, variance will increase.
(a) Select "GPS" in the line "GPS PRESET" - the menu "INITIAL SETTING 1".
The menu "GPS" will be displayed.
(b)
Select the items in the cross key and change the set value using the ＲＡＮＧＥ
ＲＡＮＧＥＲＡＮＧＥ
ＲＡＮＧＥ key.
In order to change the ship's "N/S" or "E/W" position using the left and right keys
of the cross key.
(c) Push the ＥＮＴＥＲ
ＥＮＴＥＲＥＮＴＥＲ
ＥＮＴＥＲ key.
The setting has been determined.
(d) Select "SEND DATA" in the menu "GPS".
The GPS setting will be implemented.
2. Initial setting of DGPS
2. Initial setting of DGPS2. Initial setting of DGPS
2. Initial setting of DGPS
In the event high precision position determination is intended using DGPS, it is nec-
essary to set the beacon receiver.