<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-02 -061 20:30:00.000"
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 0 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, 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" >
2026.03.02 (061) 20:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606103022030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="10.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.029" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.294" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.900" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.060" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="92.306" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="91.072" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="3.471" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="386.993" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.927" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="312.952" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="254.712" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.626" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="80.511" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.155" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.630" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="93.880" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.450" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="151">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 245.000 245.000 245.000 245.000 250.000 250.833 251.667 252.500 253.333 254.167 255.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 261.000 262.000 263.000 264.000 265.000 265.000 265.000 266.667 268.333 270.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 276.250 277.500 278.750 280.000 281.250 282.500 283.750 285.000 285.000 290.000 290.000 291.250 292.500 293.750 295.000 295.000 295.000 297.500 300.000 305.000 307.500 310.000 310.000 310.000 312.500 315.000 310.000 315.000 316.250 317.500 318.750 320.000 320.000 320.714 321.429 322.143 322.857 323.571 324.286 325.000 325.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 336.250 337.500 338.750 340.000 340.000 342.500 345.000 347.500 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 367.500 365.000 370.000 370.000 370.000 370.000 370.000 370.000 372.500 375.000 375.000 377.378 380.108 383.275 386.993 391.420 396.780 403.401 411.791 422.764 437.732 459.362 493.377
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 57 0 0 54 0 60 66 66 63 63 66 66 0 0 0 0 0 63 66 69 0 69 69 66 0 0 63 0 0 60 60 57 0 0 63 0 63 0 63 0 54 63 0 60 63 51 0 0 0 0 48 0 0 57 51 66 63 0 0 0 66 63 69 0 69 69 0 57 60 63 0 54 69 63 0 0 0 57 63 0 54 0 0 72 0 72 75 72 60 0 66 69 51 69 69 0 0 0 66 66 0 0 0 60 66 69 54 0 60 63 69 72 72 72 69 69 60 0 72 72 69 69 75 75 0 75 69 0 72 72 0 72 69 0 69 0 69 66 0 60 0 0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 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 -1.953125 2.734375 -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 -2.734375 -2.734375 -2.734375 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.9 1.95 2.0 2.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
92.306 93.697 95.443 97.819
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="174">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
87.557 90.0 91.072 95.0 99.693 100.0 105.0 108.315 110.0 115.0 116.936 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 312.952 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.958 2.06 2.031 1.917 1.917 1.917 1.917 1.945 2.028 2.06 2.101 2.171 2.247 2.328 2.416 2.51 2.611 2.721 2.839 2.966 3.104 3.251 3.41 3.58 3.762 3.956 4.161 4.378 4.606 4.845 5.095 5.354 5.623 5.901 6.187 6.481 6.782 7.089 7.401 7.717 8.035 8.353 8.666 8.97 9.256 9.515 9.734 9.895 9.985 10.0 9.998 9.975 9.93 9.863 9.777 9.674 9.555 9.423 9.278 9.123 8.958 8.786 8.607 8.423 8.235 8.044 7.85 7.655 7.46 7.264 7.069 6.875 6.683 6.493 6.305 6.12 5.938 5.759 5.583 5.411 5.243 5.078 4.918 4.761 4.608 4.459 4.314 4.173 4.035 3.902 3.773 3.647 3.525 3.406 3.292 3.18 3.073 2.968 2.867 2.769 2.675 2.583 2.494 2.408 2.325 2.245 2.168 2.093 2.02 1.95 1.882 1.817 1.754 1.693 1.634 1.577 1.522 1.469 1.418 1.368 1.32 1.274 1.23 1.186 1.145 1.105 1.066 1.029 0.993 0.958 0.924 0.892 0.861 0.83 0.801 0.773 0.746 0.72 0.695 0.67 0.647 0.624 0.602 0.581 0.56 0.541 0.522 0.503 0.486 0.469 0.452 0.436 0.421 0.406 0.392 0.378 0.365 0.352 0.34 0.328 0.316 0.305 0.294 0.284 0.274 0.264 0.255 0.246 0.237 0.229 0.221 0.213 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.06" PeakHeight="91.072" Num="3" Error="0.386">
-5.06 1.95 -0.405
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.06" EndFrequency="10.0" PeakHeight="312.952" Num="5" zHalfNm="254.712" Error="5.207">
-146.857 -46.373 0.706 -3.402 -0.09
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="25.864" Depth="0.143"/>
<TopsideChapman PeakHeight="312.952" PeakDensity="1240694.8" PeakScaleHeight="43.63" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
