Welcome back
Log in to your Altimeter Cloud account
Don't have an account? Create one
Register for a free account
We'll send a confirmation link to verify your email. Check your spam/junk folder if you don't see it.
Already have an account? Log in
Home
Device: 9C13-9ED5-E690
Flight ID: 2836Andromeda flight 6
s
s
Show events
Download
Adjust temp & pressure ?
Image
Zooming
Click and drag, or pinch on mobile
Compare flight ?
Flight summary
Altitude
Apogee
77.37 Meters
Time to apogee
3.94 seconds
Burnout altitude
60.23 m
Max velocity altitude
27.14 m
Ejection altitude
69.03 m
Landing altitude
-0.94 m
Stability
Stability score
89.3 / 100 (Excellent)
Launch straightness (20%)92.7
Coning · full (25%)93.8
Coning · boost (25%)93.3
Thrust straightness (30%)79.9
Launch tilt 2.8° · Coning 25.6/26.7°/s · Spin 36.9°/s · Thrust 95.7%
About this score
Worked out from the flight log between liftoff and 80% of apogee, independent of the angle the altimeter was mounted at in the airframe.
Launch straightness (20%) – how close to vertical it left the rod.
Coning · full (25%) and Coning · boost (25%) – how much the nose swung off the rocket's own axis. The main factor.
Thrust straightness (30%) – how cleanly the motor pushed along the body.
Spin about the rocket's own axis is not counted against it — a fast, straight spin is stable. The line under the bars shows the raw measurements.
Velocity
Max ascent
153.16 m/s
Max descent
-4.41 m/s
At burnout
11.040 m/s
Landing velocity
-2.879 m/s
Descent velocity
-2.553 m/s
Ejection velocity
-0.55 m/s
Recovery
Single deploy (no dual deploy detected)
Acceleration
Max ascent
22.11 G
Max descent
19.89 G
Max during burn
22.11 G
Average ascent
1.07 G
Average burn
3.59 G
Times
Burnout (first)
1.37 seconds
Apogee
3.94 seconds
Possible ejection
2.801 seconds
Landing
34.93 seconds
Output #1 ON
0 seconds
Output #1 OFF
0 seconds
Angles
Launch pad tilt
92.56°
Thrust calc pad tilt
2.8°
Max tilt to burnout
110.50°
Launch roll
-92.56°
Launch pitch
-2.17°
Max spin (burn)
2602.51 dps
Avg spin (burn)
58.5 dps
General
Upload date
24-Aug at 07:56
Data samples
6914
Total recording time
56.600 s
Average samples/s
122.1
Number of lockouts
1
Recording altitude
-24.19 m
Launch after startup
5m 56s
Reference axis
Y
Battery & temperature
Battery start
43%
Battery end
35%
Temperature start
36.14°C
Temperature end
33.63°C
MT1 launch temp
0°C
Output rules
No rules configured
Flight data animation
FLIGHT 2836
77.37 Meters
ALTITUDE
0.00m
VELOCITY
0.00m/s
ACCEL
0.00G
TILT
0.00°
PITCH
0.00°
ROLL
0.00°
YAW
0.00°
TIME
0.00s
AWAITING LAUNCH
ALT
altimetercloud.com
LAUNCH
T+0.00s
LANDING
BURNOUT
Motor burn complete
Note: Flight profile animation requires your altimeter to be mounted in a fixed orientation that you choose in your settings. For best results please calibrate your sensors as well.
User notes
Add this device to your account to edit
Youtube video
No video added
Add this device to your account to edit
Flight images (0)
No images added
Linked rocket
Device information
Mercury V1
Revision 3
Revision 3
Mercury V1
This flight was flown on a Mercury V1.
Hardware version
Rev 3
Software version
2.40
Last online
24-Aug at 16:07
Accelerometer
32G 3-axis
Gyroscope
2000 dgps 3-axis
Pressure sensor
Bosch BMP 581
Magnetometer
N/A
Flight motors
No motors have been added to this flight
Add this device to your account to edit
Motor burn
To overlay a thrustcurve here, add your motors to this flight using the “Flight motors” box above. The combined thrust curve is then scaled to match the recorded acceleration peak.
Launch site, date & time
Click anywhere on the map to mark your launch site. Switch between map and satellite view using the buttons below.
No results found — try a different search.
Click the map to place a marker · Drag to adjust
Lat—
Lng—
✓ Launch location saved successfully.
✗ Could not save location — please try again.
Rule events
No output rules fired during this flight.
Motor match (BETA)
Very much in testing mode! We are working out how to guess which motor a flight flew on.
Brand
Motor
Score
Shape
Burn
Cesaroni
H410-VM
108
92.6%
96.3%
Quest
B14T
100
93.9%
95.7%
AeroTech
I1299N
80
87.4%
96.3%
Quest
A6Q
79
85.4%
94.7%
Cesaroni
68-F240-VM-15A
66
88.9%
92.6%
AeroTech
H999
54
83.1%
92.9%
Cesaroni
25-E75-VM-17A
50
77%
95.2%
AeroTech
H669N
49
71.8%
93.7%
Estes
1/2A6
48
88.9%
76.9%
AeroTech
G339N
31
66.8%
92.8%
General flight settings
This is a snapshot of the settings that were used for this flight. pop over to the
pop over to the My devices page and then Configure settings on the device..
Forecast pressure
i
Set this to your local forecast pressure at sea level. This will offer you slightly improved accuracty for your flight, although it's not 100% essential every little helps!
Xcweather.co.uk is a decent place to grab pressures from for your location and time.
Xcweather.co.uk is a decent place to grab pressures from for your location and time.
1013.2 mbar
Launch detect
i
This is the altitude above the launch pad altitude where the altimeter will trigger itself into recording / flight mode.
The altimeter keeps a constant average of the pressure while waiting for launch, it uses a simple algorithm and the pre-flight buffers to do this. The most recent 120 samples (~4 seconds) are ignored so your pre-trigger altitude won't effect the ground baseline.
For almost all uses we suggest keeping this on the 25 Meter (~82 feet) default settings. If you want to test your altimeter by throwing it in the air, or are planning a very low flight you may want to lower the setting.
The altimeter keeps a constant average of the pressure while waiting for launch, it uses a simple algorithm and the pre-flight buffers to do this. The most recent 120 samples (~4 seconds) are ignored so your pre-trigger altitude won't effect the ground baseline.
For almost all uses we suggest keeping this on the 25 Meter (~82 feet) default settings. If you want to test your altimeter by throwing it in the air, or are planning a very low flight you may want to lower the setting.
35
meters
Sample ratio
i
The altimeter runs at 50Hz however you can record every sample or every X samples in order to extend the log time. For example if you set the ratio to 1 it will save 1:1 samples, or if you set it to 3 it will save 1 in 3 samples.
1:5 (hybrid, reduces after apogee)
Max samples
i
This is the maximum samples the altimeter will log per flight. When it reaches this amount it will stop and save the recording.
18000
Recording stop
i
This setting is how the altimeter decides to stop recording. You can choose either 450 (~9s) or 900 (~18s) samples stable or it will record until the max samples limit unless you press the BUTTON in Manual stop mode.
The samples stable method waits for the devices altitude not to change for the set number of samples. This is defined by not changing by more than +/- 1.0 meters for 98% of the samples, it's a reliable method to stop the recording after landing within 8-10 seconds (300 sample) or 16-20 seconds (600 sample).
The samples stable method waits for the devices altitude not to change for the set number of samples. This is defined by not changing by more than +/- 1.0 meters for 98% of the samples, it's a reliable method to stop the recording after landing within 8-10 seconds (300 sample) or 16-20 seconds (600 sample).
Auto: 450 samples stable (~9s)
Oversampling
i
Oversampling is a internal setting of the BMP 390 pressure sensor. It is how many samples are taken for each reading. By taking multiple samples for each pressure reading the altimeter reduces noise and increases the resolution of the output.
The sensor can run at 50 samples per second in 4X mode, so we suggest leaving it in this mode as it will offer the highest accuracy.
The sensor can run at 50 samples per second in 4X mode, so we suggest leaving it in this mode as it will offer the highest accuracy.
16x Oversampling
IIR filter
i
The IIR filter is another internal sensor for the BMP390 pressure sensor. It is a Infinite impulse response filter used to enhance pressure measurement accuracy by reducing noise. It's primarily for smoothing out rapid pressure changes.
We suggest not setting this too high as it will cause delay to changes in altitude if set very high.
We suggest not setting this too high as it will cause delay to changes in altitude if set very high.
COEFF 7
Pressure filter
i
This filter is a software Kalman filter that runs on the altimeters processor.
The Kalman filter uses a prediction step based on a system model and then a correction step using new measurements to refine its estimate, it creates accurate most certain results from data with noise in it.
The Kalman filter uses a prediction step based on a system model and then a correction step using new measurements to refine its estimate, it creates accurate most certain results from data with noise in it.
Kalman 2 (default)
Lockout change
i
This is how we detect a lockout. If the pressure changes by this much in a single sample downwards (pressure increase, lower altitude) then it's likely to be a false reading. Multiply the setting by 32 to get the speed in meters per second that it will trigger at.
0.5 meters
Sync sensors
i
The filters on the pressure sensor can cause it to lag very slightly behind the Accelerometer and Gyroscope data.
The Sync sensors option detects how far out of sync these sensors are. It then corrects the Acceleration and Gyroscope readings to match the pressure sensor.
ENABLED (24 samples / 132.00ms)
Orientation
i
This is the orientation you intend to install the Altimeter in your rocket. It's needed to ensure completly accurate angles and orientation charts and reports. Check out the Manual for more information on this.
Upwards (text up)
IMU filter
i
The IMU filter, or fusion filter takes the data from each axis of the Gyroscope and Accelerometer to calculate the Pitch, Roll, Yaw and tilt angle from vertical.
These filters can build up some discrepency over time so it's important to calibrate your sensors to minimise this.
Madgwick 6-Axis
Launch ALP
i
This is prevention against accidental launch detection.
With this disabled the launch is based only on pressure and something that creates a low pressure can trigger the flight by accident. For example pulling your nose cone off can even trigger it.
With this enabled the rocket also needs to have seen 8 samples (0.25 seconds) of acceleration above this setting in the last 3 seconds as well as the pressure drop to trigger. There is a backup trigger of 1.05 seconds of altitude being above the launch detect setting too.
There are very few situations where this option would cause issues, so we suggest leaving it on.
With this disabled the launch is based only on pressure and something that creates a low pressure can trigger the flight by accident. For example pulling your nose cone off can even trigger it.
With this enabled the rocket also needs to have seen 8 samples (0.25 seconds) of acceleration above this setting in the last 3 seconds as well as the pressure drop to trigger. There is a backup trigger of 1.05 seconds of altitude being above the launch detect setting too.
There are very few situations where this option would cause issues, so we suggest leaving it on.
1.4G
Launch lock
i
When enabled, the altimeter locks out recording for a set period after power on to prevent false triggering during setup.
DISABLED
Static temperature
i
A fixed temperature value used for altitude calculation when the external temperature sensor is disabled or not connected.
15.00 °C
Temp sensor
i
If an external MT1 temperature sensor is connected, this controls whether it is used for logging only or also for altitude calculations.
DISABLED
Output settings
This is a snapshot of the settings that were used for this flight.
Arm switch
i
When enabled, GP6 is a hardware arm switch — outputs and rules are held off until the switch is closed to ground.
DISABLED
Startup lockout
i
Outputs and rules are blocked for this many seconds after power-on while sensors settle. 0 = off.
None
Launch confirm delay
i
After launch is detected, outputs and rules won't fire until this many seconds have passed.
—
Altitude floor
i
Outputs and rules are blocked until the rocket is at least this height above the launch pad.
—
Custom dataset 1
i
User-defined expression evaluated per sample, available for charting.
—
Custom dataset 2
—
Sensor calibration
Calibration offsets used during this flight.
Gyroscope
⚠ Gyroscope has not been calibrated
X
0.000°
Y
0.000°
Z
0.000°
Accelerometer
⚠ Accelerometer has not been calibrated
X
0.000 mG
Y
0.000 mG
Z
0.000 mG
Device settings
This is a snapshot of the settings that were used for this flight.
This is a snapshot of the settings that were used for this flight.
Device TAG
i
A custom name or tag assigned to this device for easy identification.
Merc3792
Language
i
The language setting configured on the device.
🇬🇧 English
Shutdown mode
i
Controls what happens after recording. Standard shuts down normally, Delayed keeps WiFi on for 30 seconds after landing, Stay on keeps the device powered on.
Delayed 30s
LED brightness
i
The brightness level of the LED indicators on the Mercury. Lower values save battery.
20%
WiFi TX power
i
WiFi transmit power level. Higher gives better range but uses more battery.
2 dBm (low)
Sleep mode
i
Controls whether the device enters low-power sleep when idle.
Normal (sleep when idle)
Battery monitor
i
Monitors battery voltage during the flight.
DISABLED
Cloud group
i
The cloud group / category this flight is assigned to.
GP6 / GP7 ports
Configuration for the GP6 and GP7 general purpose output ports. These ports can drive pyro channels, servos, or other devices.
Channel 6 mode
ON = HIGH
Ch6 min pulse (µs)
1000
Ch6 max pulse (µs)
2000
Ch6 frequency
50 Hz
Ch6 angle ON
170.00°
Ch6 angle OFF
10.00°
Ch6 on time
2.00s
Channel 7 mode
ON = HIGH
Ch7 min pulse (µs)
1000
Ch7 max pulse (µs)
2000
Ch7 frequency
50 Hz
Ch7 angle ON
170.00°
Ch7 angle OFF
10.00°
Ch7 on time
2.00s
I2C PCA9685 Servo Board
This is a snapshot of the settings that were used for this flight.
Configuration for the external I2C PCA9685 servo expansion board. This board provides up to 6 additional servo channels.
No I2C servo board was connected for this flight.
Prediction and air brakes
This is a snapshot of the settings that were used for this flight.
The Mercury can predict apogee while coasting after burnout. These settings control the prediction calculation and optional air brake system.
Dry mass
i
The total mass of the rocket after motor burnout (dry mass). This is used for the ballistic prediction of apogee altitude. Enter the mass without the motor propellant, or the mass at burnout.
$tc_not_configured
Drag Cd
i
The aerodynamic drag coefficient (Cd) of the rocket. This is used with the rocket area to calculate aerodynamic drag during coast. A typical model rocket has a Cd of 0.4 to 0.8. You can find this value from OpenRocket or RockSim simulations.
$tc_not_configured
Reference area
i
The cross-sectional reference area of the rocket in square meters. This is typically the area of a circle with the body tube diameter. For example a 38mm tube has an area of approximately 0.00113 m².
$tc_not_configured
Gas constant
i
The specific gas constant for dry air, used in the atmospheric model for altitude and density calculations. The standard value is 287.05 J/(kg·K). You shouldn't need to change this unless you know what you're doing.
$tc_not_configured
The following settings configure the air brake system.
Air brake enabled
i
Enables or disables the active air braking system. When enabled, the Mercury will deploy air brakes via the configured servo channel to try and reach the target altitude. Firmware 2.1+ required.
OFF (default)
Servo channel
i
Which servo output channel the air brake mechanism is connected to. GP6 and GP7 are the two onboard servo headers, I2C channels are for an external servo expander board.
GP6
Deploy speed
i
The speed at which the air brakes deploy. The Mercury gradually increases the servo angle until the predicted apogee matches the target rather than going full on/off. This setting controls how quickly it ramps up to full braking.
Medium (default)
Target altitude
i
The target apogee altitude in meters. The air brake system will try to slow the rocket so it reaches this altitude.
$tc_not_configured
Over shoot %
i
The percentage over the target altitude to aim for until within 15% of the target. This helps prevent undershooting if the prediction is slightly off early in the coast. For example, with a 1000m target and 5% early adjustment, the Mercury will aim for 1050m until it passes 850m.
$tc_not_configured
Activation altitude
i
The air brake system activates after burnout, but won't engage until the rocket has reached this percentage of the target altitude. This prevents the brakes from deploying too early when predictions may be less accurate.
20% (default)
Comments2
If you turn on the Truefuse 2C Velocity chart from the overlays this will show you the real velocity.
It is being added to the next firmware now we've tested it.