generate autocorrelated signal/vector with normal Distribution (mean,SD)

Hey, I'm working on some Photovoltaic Simulations, and I use as an input to the PV Block in the Simulation an Irradiance Signal (W/M^2) The Irradiance signal is an averaged value per minute, that’s mean that each minute I have an average value over 1 minute. The problem is, that I would like to pad this signal with values for each second (on cloudly days the Irradiance is very fluctuable) I would like to mention that I have another irradiance signal with 1 second resolution from another day and location. SO what I'm trying to do is: 1. Calculating a moving STD over 60 seconds. 2. Calculating the autocorrelation with 1 leg. 3. Generating a signal with the following parameters: a. Normal Distribution (Mean, SD) b. Autocorrelation I would appreciate your kindly help in: 1. Acknowledge for the described steps for creating the signal. 2. Help on generating step 3.

Best regards, Dani