Comments on: A New Standard for L1/L2 GPS Static Receivers? https://www.gpsworld.com/a-new-standard-for-l1l2-gps-static-receivers/ The Business and Technology of Global Navigation and Positioning Tue, 07 Aug 2018 19:56:11 +0000 hourly 1 https://wordpress.org/?v=5.9.7 By: Mhardie Olario https://www.gpsworld.com/a-new-standard-for-l1l2-gps-static-receivers/#comment-42128 Tue, 25 Feb 2014 22:29:48 +0000 https://www.gpsworld.com/?p=21816#comment-42128 Good Day Mr Mark Silver, I would like to thank you for all the information regarding to those CHC GNSS products that you’ve mentioned, and we agreed of that. We are also a user of those receivers in the Philippines.:)

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By: Mark Silver https://www.gpsworld.com/a-new-standard-for-l1l2-gps-static-receivers/#comment-38001 Thu, 12 Dec 2013 18:27:20 +0000 https://www.gpsworld.com/?p=21816#comment-38001 In reply to toni.

Hi Toni,

The X90-OPUS is US satellite only, it does not have Bluetooth, it does not have an internal UHF radio. So it probably is not an appropriate receiver for RTK use.

Having said that, the internal board is RTK enabled.

The ‘problem’ is there is only one serial port. So if the X90-OPUS was used as a rover, the serial port would be tied up providing corrections to the head. Without Bluetooth, there is no place to connect a data collector.

If the X90-OPUS is used as a base, the serial port is tied up with the broadcast radio, and there is no place to connect a data collector to initialize the receiver.

The one (technically) possible use would be in the ‘Auto-Base’ mode. In this mode, the X90-OPUS can be set to automatically commence broadcasting corrections out the serial port, at a defined rate, when it is turned on using an Autonomously derived position.

A much better solution would be to purchase an X91+ or X900+ receiver which fully supports simultaneous communication by Bluetooth, Serial Port and GSM Modem. In addition these receivers support GLONASS and other GNSS constellations.

Finally, if you only need US Satellites, you could purchase a ‘Standard’ X90 receiver. They are more expensive (approaching the cost of the X900+ receiver) because they include both a Bluetooth and GSM Modem.

In addition to the X90-OPUS; X90’s have been introduced in several variants. Here are the possibilities: Bluetooth or No Bluetooth; UHF Radio or no UHF Radio; Cell Data Modem (three models) or no Cell Data Modem; 32 Megabyte flash or 4 GB flash; USB Flash drive interface or RS232 Serial Interface; GPS or GNSS; “+” or no “+’.

Suffice it to say that the X90-OPUS is a stripped down X90; just what you need for NGS OPUS-Static, OPUS-RS, OPUS-Projects and other L1/L2 based PPP solutions. Unfortunately not much more.

Mark

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By: toni https://www.gpsworld.com/a-new-standard-for-l1l2-gps-static-receivers/#comment-37954 Thu, 12 Dec 2013 05:16:52 +0000 https://www.gpsworld.com/?p=21816#comment-37954 please can this x90 opus perform rtk functions? if yes how?

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