do I need the IGS code for my antenna?
kind of accuracy can I expect with the SiReNT Network-RTK
What kind of equipment do I need to connect to SiReNT?
Apart from the GPS equipment, are there other costs involved?
Can I use SiReNT for static survey?
Any handy tips to validate my survey results using SiReNT?
How far can I go with my roving receiver?
Is SiReNT operating continuously?
How long does it take to initialise with SiReNT when surveying
in RTK mode?
How reliable is SiReNT?
Can I find out the status of SiReNT GPS reference stations
while in the field?
How many users can SiReNT handle at one time?
Does the technology which SiReNT uses really work?
Why am I unable to download certain RINEX data from PP-On-Demand?
Who do I contact for support?
Where can I find out the fees for all the SiReNT services?
How long must I wait for my account to be activated?
- Why did my password get locked?
The IGS code is a string of numbers and letters which
you enter into your reciever, so that your software can
know what antenna phase centre offsets to apply. The antenna
phase centre offsets enable the software to obtain highly
precise GPS surveys.
Using the correct phase centre offsets becomes very important
when different antenna types are used in a survey. When
using SiReNT base stations it is very likely that your
antenna will be different from the antenna at the base
stations. The difference in phase centre offsets between
SiReNT base station antenna and your antenna need to be
included in your GPS data processing. Normally this is
done by your processing software.
For more information, please read
When a VRS solution is created, you will basically have a
near-zero baseline when you start the survey. Since the stated
horizontal RTK accuracy spec is 1 cm plus 1 PPM of Base Line
Length (vertical spec is 2 cm plus 1 PPM), the expected accuracy
is better than that obtained using a normal single base station
solution since we are reducing the effect of one error factor.
When your roving receiver moves more than a specified distance,
it will create a new VRS solution. This will keep the 1-PPM
error factor to a minimum.
a. For real-time applications, you may use any GPS equipment
with DGPS or RTK capability which supports RTCM 2.3 or CMR
b. If not provided as part of the GPS equipment set, a separate
hardware, such as a mobile phone, might be needed to connect
the GPS equipment to the internet for real-time applications.
c. For post-processing applications, you would need a GPS
equipment with data-logging capability.
Yes. To access the DGPS data in real-time, you need to subscribe
to a GPRS service. You may want to check with GPRS service
Yes you can. As a registered user, you may log your GPS data
first during your survey and then separately access the SiReNT
website to generate and download the data that you need. You
may then process the static survey using your own software.
For real-time applications, you may start your survey on a
known control point (e.g ISN). This ensures that your equipment,
the settings in your equipment and SiReNT will provide the
results you require. You may end the day of survey by measuring
on a known point as well. New technology does not eliminate
the need for good survey techniques.
You can use SiReNT anywhere in Singapore.
Yes. SiReNT is operating continuously, that is, 24 hours a
day, every day.
Initialisation is typically shorter than 1 minute. However,
this depends greatly on the environmental conditions of your
survey location and the satellite configuration at the time
The SiReNT data control centre was designed with redundancy
and backups, including power. Downtime, if any, would be limited
to a short period.
Yes. The real-time status of SiReNT GPS reference stations
is available on the SiReNT website. Thus, you only need to
access the SiReNT website on your PDA connected to the internet
to get this information.
There is no limit on the number of roving receivers that can
access the SiReNT network at any one time.
Yes. Currently, there are already networks using this technology
PP-On-Demand only provides twelve months of RINEX data until today. For data which is unavailable through PP-On-Demand, you can request for your required data through Post-Processing Archive. In addition, Post-Processing data will only be available 1 hour after the end of the hourly-block requested time period.
e.g. Data from 9am to 10am will only be available after 11am
SiReNT HELPDESK will be available to support you during the
startup phase and thereafter.
Helpdesk contact No. : (65) 6356 6546
Operation hours of helpdesk : 9.00am - 5.00pm, Monday - Friday
The fees for PP On-Demand, RTK and DGPS can be found at Specific
Terms and Conditions As each service has different fees,
they can be found in the specific terms and conditions for
Accounts are activated within 5 working days. A notice will
be sent as confirmation.
Check you User ID and password text and format. Note: Your
password is case sensitive. If the problem persists, please
contact the SiReNT helpdesk for
assistance or to reset your password.
A policy to SiReNT is expire passwords after 90 days. Users
are advised to change their passwords before the 90-days deadline.
Expired passwords can be reset by calling SiReNT helpdesk.
Last Update : 09 January 2013