<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 21:30:00.000"
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="2 2 0 0 0 0 0 0 0 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.03.25 (084) 21:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608403252130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.914" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.637" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="431.120" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.614" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="349.475" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="307.472" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.172" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="62.279" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="20.887" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="30.697" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="66.300" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.580" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="191">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 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 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 285.000 284.375 283.750 283.125 282.500 281.875 281.250 280.625 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 280.000 281.364 282.727 284.091 285.455 286.818 288.182 289.545 290.909 292.273 293.636 295.000 293.333 291.667 290.000 290.000 290.000 290.000 290.000 295.000 295.000 295.833 296.667 297.500 298.333 299.167 300.000 300.000 300.000 300.000 300.714 301.429 302.143 302.857 303.571 304.286 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 315.000 313.333 311.667 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 325.000 325.000 320.000 320.833 321.667 322.500 323.333 324.167 325.000 326.667 328.333 330.000 330.000 330.000 330.000 331.250 332.500 333.750 335.000 336.250 337.500 338.750 340.000 340.000 340.000 340.000 340.000 340.000 340.000 341.667 343.333 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 397.273 399.545 401.818 404.091 406.364 408.636 410.909 413.182 415.455 417.727 420.000 421.181 422.546 424.144 426.038 428.319 431.120 434.642 439.203 445.343
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 0 0 0 0 0 0 0 66 66 0 60 0 0 60 0 0 0 0 0 57 69 60 0 75 0 0 0 0 0 0 0 0 0 0 0 75 0 0 0 63 66 66 0 0 0 0 0 66 0 69 0 0 0 0 0 60 0 60 0 69 0 0 0 60 63 51 48 0 66 0 0 0 63 0 0 0 69 0 66 66 66 48 54 60 0 0 69 0 0 69 0 0 66 0 69 72 0 0 69 0 0 54 0 63 69 0 69 69 54 69 0 0 69 66 72 72 69 0 72 75 72 66 0 69 0 72 63 66 72 51 75 57 60 0 66 51 69 72 72 72 72 75 60 66 69 69 72 69 60 63 0 69 57 63 69 69 0 66 66 66 0 69 66 66 63 57 63 63 0 0 0 0 60 57 57 57 51 0 0 51 54 0 0 0 45 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 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 -1.171875 -0.390625 -0.390625 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.953125 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.171875 -1.953125 -1.953125 2.734375 -1.953125 0.390625 -1.171875 2.734375 -0.390625 -2.734375 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="145">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.05 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.327 140.0 145.0 150.0 155.0 160.0 162.655 165.0 170.0 175.0 180.0 185.0 188.982 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 349.475 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.407 0.532 0.594 0.614 0.605 0.579 0.532 0.457 0.336 0.289 0.289 0.289 0.289 0.289 0.289 0.289 0.318 0.38 0.441 0.503 0.565 0.614 0.642 0.756 0.861 0.969 1.085 1.212 1.356 1.519 1.708 1.927 2.182 2.477 2.811 3.183 3.584 4.008 4.447 4.896 5.351 5.81 6.274 6.74 7.211 7.684 8.161 8.64 9.12 9.596 10.059 10.492 10.863 11.119 11.2 11.2 11.166 11.081 10.95 10.781 10.577 10.346 10.091 9.818 9.531 9.233 8.928 8.619 8.308 7.997 7.688 7.383 7.082 6.788 6.501 6.221 5.95 5.686 5.432 5.186 4.949 4.721 4.502 4.292 4.09 3.897 3.712 3.535 3.366 3.204 3.05 2.902 2.762 2.627 2.5 2.378 2.261 2.151 2.045 1.945 1.85 1.759 1.672 1.59 1.511 1.437 1.366 1.299 1.234 1.173 1.115 1.06 1.008 0.958 0.91 0.865 0.823 0.782 0.743 0.706 0.671 0.638 0.606 0.576 0.548 0.521 0.495 0.47 0.447 0.425 0.404 0.384 0.365 0.347 0.329 0.313 0.297 0.283 0.269 0.255 0.243 0.231 0.219 0.208

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.614" PeakHeight="110.0" Num="3" Error="0.0">
-23.827 5.486 -0.609
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.614" EndFrequency="11.2" PeakHeight="349.475" Num="5" zHalfNm="307.472" Error="4.5">
-138.267 -29.19 10.062 -6.862 3.764
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="78.982" Depth="0.325"/>
<TopsideChapman PeakHeight="349.475" PeakDensity="1556327.5" PeakScaleHeight="30.697" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
