5 Identical SG Configuration

The above images are for a 31 antenna SG configuration with a rotation of 5, 20, 55, 85 & 110 degrees respectively for a 10hour synthesis for a source at 30 degrees declination.

This configuration consists of 5 SG configurations with maximum baselines of 300m, 3000m, 9000m, 21000m &30000m having 6 similar antenna location in each of them. The uv coverage is uniform and well distributed and umax and vmax is around 7000.

Now, my next job would be to take FFT of these images and then compare them.

Identical - 3 SG Configuration

Above images are for a 31antenna configuration for a rotation of 5, 55, 80 degrees respectively for a 10hour synthesis.

The antenna configuration is made of 3 identical SG configuration with 10antennas in each. The only difference is that the maximum baseline in each is 300m, 3000m & 30000m. One antenna is placed at the reference point (0.0, 0.0), hence, a total of 31 antennas are present in the configuration.

The results are way better than the previous simulations but not comparable to the GMRT coverage. I believe that I have found a solution to this problem too and I shall upload the new images if they are good.

Increased Baselines

Above image is for a 42antenna SG configuration which is rotated by 55degrees for a 10h synthesis.

To compare our results with the GMRT coverage, we extended the maximum baseline to around 4000m from the existing 15m. The results obtained were very surprising as heavy redundancy was observed which can be seen in above image.

We have a new plan to resolve this issue. I shall put up the results soon !

Sierpinski Gasket

Above is an image of Level 5 Sierpinski Gasket. The more number of triangles you go on drawing inside each other, the number of Level goes on increasing.

Now for my configuration,
the primary configuration is a Level 3 SG with the orientation as seen above. North points to top, East to the right and so on. When I say "rotation of 'x' degrees, I mean that the above orientation (big triangle) is rotated by 'x' degrees anticlockwise.

SG - UV Maps II

The above images for a 42antenna configuration of Sierpinski Gasket.They are for a 10h synthesis of rotation of 35degree from original and for declination of 15, 19, 30, -30 and -45 degree declination respectively. I have chosen 35degree rotation as that has the maximum uniform coverage. The observatory location is assumed to be BITS, Pilani - Goa Campus.

Sierpinski Gasket UV-Maps

I have attached images of a 10hr. synthesis for a Sierpisnki Gasket (Level-3, 42 antennas) configuration. The original config. is such that the altitude is along the East-West direction. The four images are for a source at 30deg. declination and the observatory location is BITS, Pilani - Goa Campus. The four images correspond to the config. when the original config. is rotated by 10, 50, 90, 120 degrees respectively.

UV Simulator

The above images are for a 10hour synthesis of all 30antennas of the GMRT with +19, +30, -30 & -45 degrees declination respectively. One may refer to this GMRT Page for comparison.

The programme made to generate the uv patterns is 100% complete. I simulated the GMRT patterns and they have come as they have displayed on their website. I will now simulate the patterns for a Sierpinski Gasket configuration.