<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 11:50:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.03.20 (079) 11:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202607903201150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.697" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.639" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.800" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.860" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="108.695" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.976" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.162" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="339.040" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="249.145" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.173" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="118.540" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.596" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.680" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.250" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="125">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 225.000 225.000 235.000 235.000 235.000 237.500 240.000 245.000 250.000 255.000 255.000 265.000 270.000 270.000 275.000 275.000 280.000 285.000 287.500 290.000 290.000 290.000 295.000 295.000 295.000 300.000 297.500 295.000 300.000 300.000 301.000 302.000 303.000 304.000 305.000 305.000 310.000 310.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 335.000 336.667 338.333 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 357.500 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 385.000 385.000 387.500 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 411.667 413.333 415.000 415.000 417.500 420.000 420.000 420.000 425.000 425.000 425.000 430.000 432.500 435.000 435.000 435.000 435.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 460.000 470.000 475.000 475.000 485.000 490.000 495.000 505.000 518.965 538.254 566.627
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 63 48 57 66 0 60 63 60 57 48 63 45 63 57 54 0 60 0 54 57 63 0 57 0 0 0 45 57 48 0 0 0 0 51 48 57 57 57 0 60 60 60 0 54 54 51 0 60 57 63 66 63 0 0 57 63 66 63 63 54 60 63 66 63 63 0 54 51 57 51 48 60 54 57 63 66 57 63 54 60 60 57 63 60 66 57 60 48 0 0 45 57 0 57 63 66 60 57 51 54 0 57 57 60 60 0 60 63 63 60 60 54 60 60 54 51 48 45 51 54 57 48 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 1.953125 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 0.390625 0.390625 0.390625 2.734375 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.8 2.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
108.695 110.382
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.57 90.0 95.0 100.0 105.0 110.0 113.324 115.0 116.649 119.973 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 339.04 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.922 2.476 2.767 2.86 2.743 2.743 2.743 2.86 2.861 3.001 3.142 3.285 3.431 3.579 3.73 3.884 4.041 4.201 4.363 4.529 4.697 4.868 5.042 5.217 5.396 5.576 5.759 5.943 6.129 6.318 6.507 6.699 6.892 7.086 7.281 7.478 7.676 7.875 8.075 8.275 8.475 8.675 8.874 9.071 9.264 9.452 9.632 9.8 9.952 10.08 10.177 10.235 10.25 10.25 10.242 10.223 10.194 10.155 10.107 10.05 9.985 9.912 9.833 9.747 9.655 9.557 9.455 9.348 9.237 9.122 9.004 8.883 8.759 8.633 8.505 8.376 8.246 8.114 7.982 7.849 7.716 7.583 7.449 7.317 7.184 7.052 6.921 6.791 6.662 6.533 6.406 6.281 6.156 6.033 5.911 5.791 5.673 5.556 5.441 5.327 5.216 5.106 4.997 4.891 4.786 4.683 4.582 4.482 4.385 4.289 4.195 4.102 4.012 3.923 3.836 3.75 3.666 3.584 3.504 3.425 3.348 3.272 3.198 3.126 3.055 2.985 2.917 2.851 2.786 2.722 2.66 2.599 2.539 2.481 2.424 2.368 2.313 2.26 2.208 2.157 2.107 2.058 2.01 1.964 1.918 1.874 1.83 1.788 1.746 1.705 1.666 1.627 1.589 1.552 1.516 1.48 1.446 1.412 1.379 1.347 1.315 1.285 1.255 1.225 1.197 1.169 1.141 1.115 1.089 1.063 1.038 1.014 0.99 0.967 0.944 0.922 0.9 0.879 0.859 0.839 0.819 0.8 0.781 0.763 0.745 0.727

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.86" PeakHeight="110.0" Num="3" Error="0.0">
-30.075 12.526 -2.881
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.86" EndFrequency="10.25" PeakHeight="339.04" Num="5" zHalfNm="249.145" Error="2.396">
-183.061 -47.05 13.431 -2.98 0.593
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.973" Depth="0.117"/>
<TopsideChapman PeakHeight="339.04" PeakDensity="1303505.0" PeakScaleHeight="65.68" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
