[Canberrauav] PiCam Ground Spatial Distance calculations

james owens scoobydrive at hotmail.com
Tue Dec 12 08:01:46 AEDT 2017


Good Morning all,

I’ve run the numbers for the Raspberry PiCam V2 through a Ground Spatial Distance calculator from Pix4D here https://drive.google.com/open?id=11t-wnnlBtJctSrqfhwfIaeIFqvYpX8pakklvxi-cZ_g.

I think there is some utility in the figures to help in planning collection from the sensor. I think the key ‘so what’ is;
- if we are going to start the collection run on the search area at 120m AGL there is no point having features on the Emergency Landing Target that are less than 4.5cm x 4.5cm
- if each image is 145m x 90m at 120m AGL, the aircraft will need to descend as part of the target location refinement process in order to bring the images down to a size where the GPS location of an individual image is accurate enough to get the required landing location accuracy.

The key figures are:

@120m
The Ground Sampling Distance for the sensor will be 4.43cm/pixel
The width of a single image will be 145m
The height of a single image will be 109m

@80m
The Ground Sampling Distance for the sensor will be 3.69cm/pixel
The width of a single image will be 121m
The height of a single image will be 91m

@50m
The Ground Sampling Distance for the sensor will be 1.85cm/pixel
The width of a single image will be 61m
The height of a single image will be 45m

Cheers

Jimmy


On 11 Dec 2017, at 12:00 pm, canberrauav-request at canberrauav.org.au<mailto:canberrauav-request at canberrauav.org.au> wrote:

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Today's Topics:

  1. Monday AGM and Mumble (Stephen Dade)


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Message: 1
Date: Sun, 10 Dec 2017 10:34:48 +0000
From: Stephen Dade <stephen_dade at hotmail.com>
To: "canberrauav at canberrauav.org.au" <canberrauav at canberrauav.org.au>
Subject: [Canberrauav] Monday AGM and Mumble
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Hi all,

CanberraUAV will have it's AGM 8 pm Monday (tomorrow). After the AGM we'll move onto our usual weekly meeting.

The agenda for the AGM is:
-Confirm the minutes of the last AGM
-Report on CanberraUAV activities in the last financial year
-Election of office-bearers
-Receive and consider the statement of accounts and the reports that are required to be submitted to members under the Act, section 73 (1).

The agenda for our weekly meeting is:
-Weekend flying review
-CUAV software update




Thanks
Stephen
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