<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 15:10:00.000"
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="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</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) 15:10:00</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">
FF202607903201510009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.659" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.923" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" Name="h`F2" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.407" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.368" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="335.826" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="226.819" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.288" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="141.547" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.821" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="80.325" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="174.650" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="92">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 295.000 295.000 300.000 300.833 301.667 302.500 303.333 304.167 305.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 316.250 317.500 318.750 320.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 337.083 339.167 341.250 343.333 345.417 347.500 349.583 351.667 353.750 355.833 357.917 360.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 435.000 435.000 440.000 440.000 450.000 455.000 460.000 465.000 465.000 470.000 475.000 485.000 490.000 500.000 510.000 520.000 532.717 547.377 564.465 584.636 608.808
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 48 45 0 48 0 0 0 51 48 45 54 54 48 48 0 51 45 0 0 0 51 54 60 60 60 63 66 63 63 66 0 0 0 0 0 0 0 0 0 54 0 48 60 66 66 63 66 66 66 66 66 60 66 60 66 60 66 63 66 66 60 66 63 63 63 60 66 66 63 57 66 63 63 60 60 60 60 60 60 60 60 57 60 57 54 48 51 45 45 45
</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 2.734375 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -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 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 -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
</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" >
89.48 90.0 95.0 100.0 105.0 110.0 111.481 112.962 114.443 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 335.826 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.292 2.948 3.296 3.407 3.284 3.284 3.407 3.429 3.606 3.763 3.91 4.053 4.193 4.332 4.472 4.613 4.755 4.9 5.047 5.197 5.35 5.505 5.663 5.824 5.987 6.153 6.32 6.49 6.66 6.832 7.004 7.176 7.348 7.52 7.691 7.86 8.028 8.193 8.356 8.515 8.671 8.822 8.967 9.105 9.235 9.356 9.464 9.559 9.637 9.696 9.734 9.75 9.75 9.747 9.738 9.721 9.698 9.669 9.634 9.593 9.547 9.496 9.44 9.379 9.314 9.245 9.173 9.097 9.018 8.936 8.851 8.764 8.674 8.582 8.488 8.393 8.296 8.198 8.099 7.998 7.897 7.795 7.693 7.59 7.487 7.383 7.279 7.176 7.072 6.969 6.866 6.763 6.661 6.559 6.458 6.357 6.257 6.158 6.059 5.962 5.865 5.769 5.674 5.58 5.487 5.395 5.304 5.214 5.125 5.038 4.951 4.865 4.781 4.697 4.615 4.534 4.454 4.375 4.297 4.221 4.145 4.071 3.998 3.926 3.855 3.785 3.716 3.649 3.582 3.517 3.452 3.389 3.326 3.265 3.205 3.146 3.087 3.03 2.974 2.919 2.864 2.811 2.758 2.707 2.656 2.606 2.557 2.509 2.462 2.416 2.37 2.326 2.282 2.239 2.196 2.155 2.114 2.074 2.035 1.996 1.958 1.921 1.885 1.849 1.814 1.779 1.745 1.712 1.68 1.648 1.616 1.585 1.555 1.525 1.496 1.468 1.44 1.412 1.385 1.359 1.333 1.307 1.282 1.258 1.233 1.21

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.407" PeakHeight="110.0" Num="3" Error="0.0">
-30.512 13.168 -3.176
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.407" EndFrequency="9.75" PeakHeight="335.826" Num="5" zHalfNm="226.819" Error="4.668">
-194.673 -35.504 8.536 -1.144 1.402
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.443" Depth="0.123"/>
<TopsideChapman PeakHeight="335.826" PeakDensity="1179435.5" PeakScaleHeight="80.325" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
