Enter the content which will be displayed in sticky bar
Gp. Capt. Gurcharn S. Sandhu
local time: 2023-02-04 06:10 (+05:30 )
Gp. Capt. Gurcharn S. Sandhu (Abstracts)
Titles Abstracts Details
  • Erroneous UTC Maintained by Timing Labs due to Mix-Up between Relativistic and Absolute Time (2013) [Updated 9 years ago]
    by Gurcharn S. Sandhu   read the paper:

    In Relativity the Newtonian notions of absolute motion, absolute time, and absolute reference frame have been replaced with relative motion, relativistic time, and inertial reference frames in motion. Relativity is essentially rooted in the assumed isotropy of light speed in earth centered inertial (ECI) reference frame. Under the current procedures of satellite based time transfer, due to the assumed isotropy of light speed in ECI frame, an e-synchronous or relativistic time gets distributed to the master clocks of Timing laboratories located all over the globe. That is, the master clocks in all Timing Labs get e-synchronized instead of achieving absolute synchronization. It is erroneous to compute UTC from the weighted average of relativistic time maintained by these master clocks. The absolute synchronization mismatch between two e-synchronized clocks is given by the relation (D.U)/c^2, where D is the separation distance between the two clocks and U is the absolute velocity vector (unknown) of the earth. This absolute synchronization offset between the master clocks at two distant Timing Labs can be physically measured with an appropriate portable clock and such measurements can be used to determine the unknown absolute velocity U of earth. By incorporating the absolute velocity U in the time transfer software, we can account for the anisotropic speed of light in the ECI frame and thereby ensure the distribution of absolute time to different clocks all over the globe. In that case it should even be possible to achieve absolute synchronization in space clocks in deep space flights.


  • Detection of Absolute Motion through Measurement of Synchronization Offsets (2012) [Updated 1 decade ago]
    by Gurcharn S. Sandhu   read the paper:

    Applied Physics Research Vol. 4, No. 4

    An absolute reference frame may be defined as the one which is stationary with respect to the center of mass of
    the Universe and in which speed of propagation of light is an isotropic constant. Any motion with respect to this frame may be referred as absolute motion. In this paper we examine the Sagnac effect of absolute motion in the context of clock synchronization through GPS satellites in common view mode. The e-synchronization of two clocks A and B amounts to introduction of time offsets such that the time taken by a light pulse to propagate between A and B will be measured to be the same in both directions. Synchronization of two clocks through a GPS satellite in common view mode is effectively equivalent to e-synchronization of these clocks and introduces an absolute synchronization mismatch proportional to the absolute velocity and length of the baseline. Measurement of this synchronization offset between the GPS synchronized clocks at the ends of a long baseline will enable the practical detection of absolute motion of earth. Here we propose a simple experiment for detection of absolute motion through measurement of absolute synchronization offsets between two timing laboratories maintaining UTC time.


  • Demystification of the Spacetime Model of Relativity (2011) [Updated 1 decade ago]
    by Gurcharn S. Sandhu   read the paper:

    The geometrical interpretation of gravitation in general theory of relativity imparts certain mystical properties to the spacetime continuum. The mystic connotations associated with this spacetime model may be attributed to the fallacious depiction of spacetime as a physical entity. This paper proves that the spacetime continuum in general relativity is a simple mathematical model and not a physical entity.


  • Relativity: a Pillar of Modern Physics or a Stumbling Block (2011) [Updated 1 decade ago]
    by Gurcharn S. Sandhu   read the paper:

    Currently, the theory of Relativity is being regarded as one of the main pillars of Modern Physics, essentially due to its perceived role in high energy physics, particle accelerators, relativistic quantum mechanics, and cosmology. Since the founding assumptions or postulates of Relativity and some of the resulting consequences confound the logic and common sense, a growing number of scientists are now questioning the validity of Relativity. The advent of Relativity has also ruled out the existence of the 19th century notion of ether medium or physical space as the container of physical reality. Thereby, the Newtonian notions of absolute motion, absolute time, and absolute reference frame have been replaced with the Einsteinian notions of relative motion, relative time, and inertial reference frames in relative motion. This relativity dominated viewpoint has effectively abandoned any critical study or advanced research in the detailed properties and processes of physical space for advancement of Fundamental Physics. In this paper both special theory of relativity and general relativity have been critically examined for their current relevance and future potential. We find that even though Relativity appears to be a major stumbling block in the progress of Modern Physics, the issue needs to be finally settled by a viable experiment [Phys. Essays 23, 442 (2010)] that can detect absolute motion and establish a universal reference frame.


  • Proposed experiment for detection of absolute motion (2010) [Updated 9 years ago]
    by Gurcharn S. Sandhu   read the paper:

    According to special theory of relativity (SR) all motion is relative and existence of any privileged or absolute inertial frame of reference, which could be practically distinguished from all other inertial frames, is ruled out. However, we may define an absolute or universal reference frame as the one which is at rest with respect to the center of mass of the universe and assume the speed c of propagation of light to be an isotropic universal constant in that frame. Any motion with respect to such a reference frame will be called ?absolute motion‟. The proposed experiment establishes the feasibility of detection of such an absolute motion by measuring the up-link and down-link signal propagation times between two fixed points on the surface of earth. With current technological advancements in pulsed lasers, detectors, precision atomic clocks and computers, feasibility of the proposed experiment has been confirmed. Successful conduct of the proposed experiment will initiate a paradigm shift in fundamental physics.