[Solved] Extract Data from Corrupted TerraSync file, Pathfinder can't correct & won't open

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Kevin Nolan

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Kevin Nolan Asks: Extract Data from Corrupted TerraSync file, Pathfinder can't correct & won't open
I had an employee recording points for a project with a Trimble Geo XT 7 series receiver attached to a Zephyr 2 external antenna. The receiver went to sleep between collecting episodes. Upon attempting to re-open, the file came back as corrupted and TerraSync was unable to fix and open the file. I have never had an unrecoverable corruption and didn't expect this to be a permanent problem. We stared a new file and finished collecting data.

However, now Pathfinder cannot fix and refuses to open the corrupted file. I copied the corrupted file parts to a separate folder manually (Pathfinder won't transfer file). I can open the individual files that show up in Windows Explorer (*.dd, *.gic, *.gip, *.gis, *giw, *.gix, *.obs, *.obx) in various programs (Notepad, Word, Excel), but only user-entered data (comments, notes, text fields from data dictionary form) show up as readable text. The rest is various combinations of numbers, letters, and symbols. I need to extract the coordinate data from this file, even if I can't postprocess and correct it.

Is there any way to translate the data displayed as symbols into text and numbers so that I can see the coordinates?

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I have a grid that I have created and a path that is there. I want to calculate the number of points each grid has or I want to calculate the number of points each slab or rectangle has. enter image description here

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epcardiel Asks: Delete polygons from layer 1 with polygons from layer 2 based on a common attribute between both layers
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[Solved] (GEE) constant value after applying scaling factor to LANDSAT

N_LLC Asks: (GEE) constant value after applying scaling factor to LANDSAT
After applying a scaling factor to my LANDSAT collection 2 level 2 data the values seem to be off.

screen capture of code and output

Code: 
var addNDVI = function(image) {
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print(series1);
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Parallel transport in curved spacetime

  • Tanmoy Pati
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  • Replies: 0
Tanmoy Pati Asks: Parallel transport in curved spacetime
This is sort of a very introductory question and I am not finding any reference regarding this. And let me know whether my answer is correct or not.

For example, we are parallelly transporting a vector on a surface (intrinsic parallel transport). We take two points and join by a curve and we will do the procedure along the curve. In terms of intrinsic coordinates $P=P(u)$ and $Q=Q(u+du)$. From $P(u)$ if we transport a vector, parallelly, the important condition is $$ \nabla_i V^j=0\\ \text{or}, \quad \partial_iV^j=-\Gamma^j_{ik}V^k\\ \text{or,} \quad V_\parallel^j(u+du)=V_\parallel^j(u)-\Gamma^j_{ik}V_\parallel^k(u) du^i+\mathcal{O}(du^2) $$ This transport is done in one path. If we take another path to do the same operation, if $R^a_{bcd} \neq 0$, we will get two different answers for the transported vector component at $Q(u+du)$. So, from the eqn how to interpret this? In particular, there should be some terms which will make $V_\parallel^j(u+du)$ different from one path to another.

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What happens with the tip vortices of two aircraft flying in the opposite direction?

  • lWindy
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  • Replies: 0
lWindy Asks: What happens with the tip vortices of two aircraft flying in the opposite direction?
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I would like to place this in the light of the existence of a root vortex experienced by wind turbines. From Burton's Wind Energy Handbook (3rd edition, p78) :

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With the aircraft example the circulation is opposite in sign as well. So why is the root vortex a summation of the two blades instead of cancellation?

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  • Zuhair Al-Johar
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Zuhair Al-Johar Asks: Does parallelism of cardinal comparison between sets and their power sets, enact a form of choice?
Let $ * $ range over cardinal relations $ \{<,=,>, <>\}$, if we add the following axiom to $\sf ZF$, would that prove a known form of choice?

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