Identifying these properties will lead to a better understanding of the formation and evolution of the Solar System.Īims. Remote light scattering and thermal infrared observations provide clues about the physical properties of cometary and interplanetary dust particles.
![ram pressure meteor ram pressure meteor](https://live.staticflickr.com/2073/1556255564_639239d1f2_b.jpg)
The mass index of the 12 fragments in the July 21 meteoroid was very high (s = 2.8), indicating possible progressive fragmentation.Ĭontext. Fragmentation type and strength do not appear to be dependent on orbit. Measured compressive strengths of 20 fragmenting meteoroids (with less precise radiants due to their morphology) was in the range of 1-4 kPa, which is in excellent accord with Rosetta in-situ measurements of 67P. The CAMO radiant and initial velocity precision for non-fragmenting meteors with short wakes is ~0.5' and 1 m/s, while that for meteors with fragments or long wakes is similar to non-tracking, moderate field of view optical systems (5', ~50 m/s). We find that meteor trajectory accuracy significantly depends on meteor morphology. The uncertainty in the atmosphere mass density was estimated to be +/-25% using NAVGEM-HA data. The aerodynamic ram pressure at the moment of fragmentation was used as a proxy for compressive strength, and strengths of an additional 19 fragmenting meteoroids were measured in the same way. The event was manually reduced and the exact moment of fragmentation was determined. It had a shallow entry angle ~8 deg and 12 fragments were visible in the narrow-field video. On July 21, 2017, CAMO observed a ~4 second meteor on a JFC orbit. We investigate the influence of meteor morphology on radiant and velocity measurement precision, and use direct observations of meteoroid fragmentation to constrain their compressive strengths.
![ram pressure meteor ram pressure meteor](https://enygames.com/sites/default/files/RAM%20Pressure%201.jpg)
We describe the upgraded hardware and give details of the data calibration and reduction pipeline. The mirror tracking system of the Canadian Automated Meteor Observatory (CAMO) can track meteors in real time, providing an effective angular resolution of 1 arc second and a temporal resolution of 100 frames per second.