# Constant Altitude

<table data-view="cards"><thead><tr><th></th><th></th></tr></thead><tbody><tr><td><img src="/files/kqsxMdpuKhr5G7C0RycZ" alt="" data-size="original"></td><td>DJI P1  </td></tr><tr><td><img src="/files/Y9PEJiLBYBC40Mhg59kC" alt="" data-size="original"></td><td>Sentera 65R </td></tr><tr><td><img src="/files/nha9OYXNQJf1SZaJO94F" alt="" data-size="original"></td><td>Sony A7R4</td></tr></tbody></table>

## Description

A constant altitude comparison of the Sentera 65R, DJI P1, and Sony A7R4. The GSD values from each sensor will vary based on their lens.&#x20;

## Flight Specifications

<table><thead><tr><th width="107">Sensor</th><th width="95">Aircraft</th><th width="105" align="center">GSD</th><th width="101" align="center">Altitude</th><th width="95" align="center">Overlap</th><th>Flight Speed</th><th width="63">RTK</th><th>Image Format</th><th>Data Volume</th><th>Number of Photos</th></tr></thead><tbody><tr><td>Sentera 65R</td><td>M300</td><td align="center">0.28in/0.72cm</td><td align="center">200ft / 60m</td><td align="center">75%</td><td>10mph</td><td>No</td><td>JPEG</td><td>12.3GB</td><td>439</td></tr><tr><td>DJI P1</td><td>M300</td><td align="center">0.30in/0.77cm</td><td align="center">200ft / 60m</td><td align="center">75%</td><td>10mph</td><td>No</td><td>JPEG<br>RAW</td><td>14.9GB<br>48.1GB</td><td>569</td></tr><tr><td>Sony A7R4</td><td>Astro</td><td align="center">0.38in/.95cm</td><td align="center">200ft / 60m</td><td align="center">75%</td><td>10mph</td><td>No</td><td>JPEG</td><td>6.6GB</td><td>280</td></tr></tbody></table>

## Camera Specifications

<table><thead><tr><th width="106">Sensor</th><th width="85" align="center">HFOV</th><th width="82" align="center">VFOV</th><th width="134" align="center">Focal Length</th><th>Resolution</th><th>Max Capture Rate</th></tr></thead><tbody><tr><td>Sentera 65R</td><td align="center">57.9</td><td align="center">45.1</td><td align="center">27mm</td><td>65MP<br>9344x7000</td><td>3 FPS</td></tr><tr><td>DJI P1</td><td align="center">54.5</td><td align="center">37.8</td><td align="center">35mm</td><td>45MP<br>8192x5460</td><td>1.5 FPS</td></tr><tr><td>Sony A7R4</td><td align="center">73.3</td><td align="center">55</td><td align="center">24mm</td><td>60MP<br>9504x6336</td><td>0.5 FPS</td></tr></tbody></table>

## Data Set Contents

* RGB Mosaic
* DSM
* Raw Images
* Stitching Report

{% hint style="info" %}
If you want to download the raw images and process yourself, download the Raw Images.zip file from each folder location.&#x20;
{% endhint %}

## Sentera 65R Data

{% embed url="<https://workdrive.zohoexternal.com/external/58e79a7c53a589541cb29eb95a1e84efb0bd4af6aaa11eb36551b5978de36ba8>" %}

## DJI P1 Data

{% embed url="<https://workdrive.zohoexternal.com/external/39e540829293539bfca0cf12b68ac5fdc6d0a592cdf48705c20382d16dc163a5>" %}

## Sony A7R4 Data

{% embed url="<https://workdrive.zohoexternal.com/external/b80619a4652dbf51479b21c155d097da779e815bcd3066790c02dfa9c2e696d6>" %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://support.senterasensors.com/65r-sensor-user-guide/sample-data/65r-vs-p1-vs-a7r4-comparison/constant-altitude.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.