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Status

Status

colour	Yellow
title	In process

Impact

Status

colour	Red
title	High

Driver

Approver

Contributors

Informed

Not yet informed.

Due date

11-22-2023

Resources

References

https://discord.com/channels/776618956638388305/1157058056631369729

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Currently our drone is supported by NEO M8 GPS manufactured by Team Blacksheep. We are currently attempting to source another GPS from VectorNav for a VN-200 rugged dev kit through sponsorship.

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NEO vs

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PX

M8P

F9P

Description

single-banded (L1), M8P module uses M8 positioning engine and is able to support Time Kinematic (RTK) technology.

Dual banded (L1, L2), F9P module uses F9 positioning engine. which is newer than M8, and is able to support Time Kinematic (RTK) technology.

Pros and cons

Cheaper

Easier to find alternatives

Incorrect position compared to F9P

Resolves RTK FIXED within seconds

Better position hold performance

Expensive

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M8P vs

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F9P

	M8P	F9P
Description	single-banded (L1), M8P module uses M8 positioning engine and is able to support Time Kinematic (RTK) technology.	Dual banded (L1, L2), F9P module uses F9 positioning engine. which is newer than M8, and is able to support Time Kinematic (RTK) technology.
Pros and cons

advantage

disadvantage

advantage

disadvantage

Cheaper

Easier to find alternatives

Incorrect position compared to F9P

Resolves RTK FIXED within seconds

Better position hold performance

Expensive

🚨 M8P Options & D9S

Buy link / datasheet	NEO M8P	NEO D9S
Product Page	https://www.u-blox.com/en/product/neo-m8p-series
Reliability	L1 only	All L-bands However, Rover Only & Less community experience.
Cost (CAD)	$129-199	$48.85
Size and Weight	12.2 x 16.0 x 2.4 mm, 1.6 g	12.2 x 16.0 x 2.4 mm, 1.6 g
Position Accuracy	0.025 m + 1 ppm CEP	Undocumented
Convergence time	< 60 s Cold start 26s - 29s	Undocumented
VSupply	2.7 V to 3.6 V	2.7 V to 3.6 V
Interfaces	Already have driver	Driver needed.
Weatherproof?	−40 °C to +85 °C	−40 °C to +85 °C Model B −40 °C to +105 °C Model A

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	NEO F9P	ZED F9P	ZED F9R
Product page	https://www.u-blox.com/en/product/neo-f9p-module?legacy=Current#Product-Selection	https://www.u-blox.com/en/product/zed-f9p-module
Cost (CAD)	$350	$129	$150-220
Reliability	L1, L5	L1, L5	L1, L2 Rover only
Size and Weight	12 x 16 x 3.6 mm, 1.25g	17 x 22 x 2.4 mm, 2g	17 x 22 x 2.4 mm, 2g
Position Accuracy	0.01 m + 1 ppm CEP	0.01 m + 1 ppm CEP	< 0.01 m + 1 ppm CEP
Convergence time	< 10 s Cold start 27s - 37s	< 10 s Cold start 25s - 30s	< 10 s Cold start 24 s - 28s
VSupply	2.7 V to 3.6 V	2.7 V to 3.6 V	2.7 V to 3.6 V
Interface	Driver needed.	Driver needed.	Driver needed.
Weatherproof?	−40 °C to +85 °C	−40 °C to +85 °C	−40 °C to +85 °C

	NEO F9P	PX1172RH-HAT
Product page	https://www.u-blox.com/en/product/neo-f9p-module?legacy=Current#Product-Selection *Product including NEO-F9P and is compatible with Ardupilot usually ranges between 300-400$	https://navspark.mybigcommerce.com/px1172rh-hat-px1172rh-l1-l2-rtk-position-heading-receiver-for-arduino-raspberry-pi-pixhawk-and-surveying/ *Needs to buy antenna separately.
Cost (CAD)	$350 Pricier than PX1172RH	$190
Reliability	L1, L5	L1, L2 L5 performs better with obstacles and produces less noises
Size and Weight	12 x 16 x 3.6 mm, 1.25g	17 mm x 22 mm x 2.9 mm, 1.7g Bigger and Heavier
Position Accuracy	0.01 m + 1 ppm CEP	0.01 m + 1 ppm CEP
Convergence time	< 10 s Cold start 27s - 37s Cold start takes more time	< 10 s Cold start 28s -29s
VSupply	2.7 V to 3.6 V	3.3V DC +/-10% Consumes more power
Interface	Driver needed.	Driver needed.
Weatherproof?	−40 °C to +85 °C	−40 °C to +85 °C

\uD83C\uDF1F Recommendations

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