==================================================================
     Date:  210727  210728  210729  210730  210731  210801  210802
------------------------------------------------------------------
NWRA SSNe:    22.9    26.3    15.0    10.9    16.4     9.0    10.2
NWRA Pred:    20.0    21.0    23.0    15.0    13.0    16.0    12.0
Mean SSNe:    22.4    23.6    21.7    20.5    19.1  -999.0  -999.0
    SWS T:    16.0    24.0    21.0    18.0    13.0    11.0  -999.0
------------------------------------------------------------------
     EISN:    17.0     7.0     4.0     0.0     2.0     8.0    12.0
 F10 SSNf:    25.6    23.9    17.6    16.9    17.8    15.7  -999.0
FBAR SSNf:    23.5    23.5    23.6    23.7    23.8    23.9  -999.0
------------------------------------------------------------------
      F10:    79.6    78.8    75.8    75.5    75.9    74.9  -999.0
SWPC Pred:    82.0    80.0    80.0    76.0    76.0    74.0    72.0
     FBAR:    78.6    78.6    78.7    78.7    78.8    78.8  -999.0
------------------------------------------------------------------
   GFZ Ap:     5.0    13.0     8.0     5.0     5.0     3.0  -999.0
SWPC Pred:     7.0    10.0    10.0     8.0     8.0    10.0     5.0
------------------------------------------------------------------
From SSNe Analysis (RMS foF2,%RMS,NUM): 0.95MHz , 19.1% , 582     
==================================================================
GOES 1-8A X-ray flux at 2021-08-02T05:36:00: A4
==================================================================
Real-time Geomagnetic Indices from GFZ Potsdam                    
                  09-12  12-15  15-18  18-21  21-00  00-03  03-06 
3-Hour ap (est)      3      4      4      5      3      4      2  
3-Hour Kp (est)     1-     1o     1o     1+     1-     1o     0+  
24-Hour Ap (est)     4      3      3      3      3      3      3  
==================================================================
Created on: Mon Aug 2 05:41:42 UTC 2021
[2021, NorthWest Research Associates, Inc]
 

The preceeding table is a listing of various space-weather indices from a variety of sources. The listings in the upper section of the table are daily values covering the past week, and the listings in the lower section (labeled Real-time Geomagnetic ...) are for the past 21 hours. A brief description of each parameter listed and the source of each is provided below:

---

• NWRA SSNe: This is a daily effective sunspot number (SSN) calculated by NWRA from ionospheric foF2 measurements provided by the National Centers for Environmental Information (NCEI). The value for the current day is calculated from the last 24 hours of foF2 data.
• Pred: A predicted SSNe for the this date.
• Mean SSNe: An SSNe calculated using five-day mean foF2 values.
• SWS T: The daily T-index from the Austrailian Space Weather Services (SWS).

---

• EISN: The Estimated International Sunspot Number from the WDC-SILSO, Royal Observatory of Belgium, Brussels.
• F10 SSNf: SSN calculate from the 10.7cm solar radio flux (see F10 below and this link).
• FBAR SSNf: SSN calculate from the 90-day mean F10.7 (see FBAR below and this link).

---

• F10: The daily noon 10.7cm solar radio flux (F10.7) from the Dominion Radio Astrophysical Observatory (DRAO).
• SWPC Pred: The predicted daily Penticton 10.7cm solar radio flux from the NOAA SWPC.
• FBAR: The daily 90-day mean of F10.7.

---

• GFZ Ap: Preliminary estimate of the daily Ap index from GeoForchungsZentrum Helmholz Centre Potsdam.
• SWPC Pred: Forecast of the daily Ap index form the NOAA SWPC.

---

• From SSNe Analysis: The RMS and percent RMS difference between the foF2 values used in generating the most recent NWRA SSNe value and foF2 calculated using the SSNe value in the CCIR foF2 model; and the number of foF2 values used in calculating SSNe.

---

• GOES X-ray flux: The most recent 1-8 Angstrom (0.1-0.8 nm) solar x-ray flux from the primary GOES satellite in flare classification level (A, B, C, M, X). A flux level of '--' indicates that the flux is below the A classification level.

  ---

• 3-Hour ap: Preliminary estimate of the geomagnetic ap index calculated for the 3-hour period at the column head. These (and the following two) indices are calculated by the GeoForchungsZentrum Helmholz Centre Potsdam.
• 3-Hour Kp: Preliminary estimate of the geomagnetic Kp index calculated for the 3-hour period at the column head.
• 24-Hour Ap: Preliminary estimate of the 24-hour Ap index calculated for the 24-hour period ending at the end of the 3-hour period at the column head.

Notes:

1. A -999.0 in the upper section is a missing-data indicator.

Plots and further information about these and other space-weather indices can be found on our space-weather indices page.