Q. One sidereal day is ______ solar hours and ______ solar minutes long.

View solution

Q. Which of the following solar time duration is not constant throughout the year?

View solution

Q. What is local true solar time?

View solution

Q. The length of mean solar day is slowly increasing.

View solution

Q. What is the relationship between insolation and cloud cover in sky?

View solution

Q. Which of the following is a reason for inverse relationship between insolation and cloud cover in sky?

View solution

Q. Which does Angstrom-Savinov formula tell?

View solution

Q. What does the constant “k” signify in the Angstrom-Savinov formula?

View solution

Q. The constant “k” in Angstrom-Savinov formula depends on ________

View solution

Q. How does the constant “k” in Angstrom-Savinov vary in high and low latitudes?

View solution

Q. Which of the following models uses linear regression to estimate solar radiation from sunshine duration?

View solution

Q. Akinoglu and Fcevit uses a _______ to estimate solar radiation.

View solution

Q. How is an empirical model developed?

View solution

Q. What does the ratio of global solar radiation (H) and estimated daily global radiation for cloudless sky (H₀) indicate?

View solution

Q. Which of the following is important during data acquisition from measuring instruments? Assume that details about data to be collected is known.

View solution

Q. Which of the following statistical indicator is used to evaluate any type of model?

View solution

Q. Why do ground-based observers overestimate overcast cloud cover?

View solution

Q. Reduction of error between simulated values and the true values increases accuracy of the empirical model.

View solution

Q. Cloud cover estimation is free from error.

View solution

Q. Hourly radiation values can be used to evaluate the performance of ________

View solution