<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-03 -062 23:00:00.000"
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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, 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" >
2026.03.03 (062) 23:00:00</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">
FF202606203032300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.465" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.182" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="510.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="510.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="555.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="513.655" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="474.484" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.065" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="64.439" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.576" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.772" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="103.310" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="110">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
510.000 550.000 555.000 575.000 580.000 576.579 573.158 569.737 566.316 562.895 559.474 556.053 552.632 549.211 545.789 542.368 538.947 535.526 532.105 528.684 525.263 521.842 518.421 515.000 525.000 530.000 535.000 540.000 545.000 545.000 545.000 545.000 545.000 535.000 540.000 540.000 540.227 540.455 540.682 540.909 541.136 541.364 541.591 541.818 542.045 542.273 542.500 542.727 542.955 543.182 543.409 543.636 543.864 544.091 544.318 544.545 544.773 545.000 545.000 542.500 540.000 540.000 540.000 540.000 540.000 540.000 540.000 540.000 540.000 545.000 545.000 545.000 545.000 545.833 546.667 547.500 548.333 549.167 550.000 550.833 551.667 552.500 553.333 554.167 555.000 555.833 556.667 557.500 558.333 559.167 560.000 565.000 570.000 570.000 571.667 573.333 575.000 595.000 590.000 586.667 583.333 580.000 575.000 570.000 565.000 555.000 570.000 580.000 591.557 604.882
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 54 51 48 0 48 0 48 0 0 0 54 0 0 0 51 51 0 0 0 0 0 54 51 0 0 54 51 0 48 0 54 54 54 51 0 0 0 51 0 0 57 0 51 48 0 0 0 0 0 0 51 0 54 0 0 54 51 48 48 48 51 0 48 0 51 0 48 48 0 0 51 0 0 0 0 0 0 0 51 0 0 48 51 48 48 51 51 48 48 51 51 51 0 0 45 45 45 0 0 48 48 0 48 45 45 45 45 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -1.171875 0.390625 0.390625 0.390625 1.953125 0.390625 1.171875 0.390625 1.171875 0.390625 1.953125 1.953125 -0.390625 -0.390625 -1.171875 1.171875 2.734375 -1.171875 0.390625 1.953125 0.390625 0.390625 -0.390625 0.390625 -1.171875 -1.171875 2.734375 -1.171875 -0.390625 0.390625 0.390625 -1.953125 -0.390625 1.953125 -0.390625 -0.390625 -0.390625 -1.171875 1.953125 -1.953125 -1.171875 -1.953125 0.390625 0.390625 -1.171875 1.953125 -1.953125 -2.734375 -1.171875 -0.390625 -0.390625 0.390625 0.390625 -1.171875 0.390625 -1.171875 -1.953125 -1.953125 -1.171875 0.390625 0.390625 -0.390625 1.171875 1.171875 -1.171875 -0.390625 -2.734375 0.390625 -1.171875 1.171875 -1.171875 1.171875 -2.734375 -1.953125 -1.953125 -1.953125 -0.390625 -1.171875 -1.171875 -2.734375 -1.953125 -1.171875 -0.390625 0.390625 -2.734375 -1.953125 0.390625 -1.171875 -0.390625 0.390625 1.171875 -0.390625 -0.390625 0.390625 -1.171875 -0.390625 0.390625 -1.171875 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="171">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.724 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.449 180.0 185.0 190.0 195.0 200.0 205.0 210.0 211.173 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 513.655 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.329 0.309 0.28 0.24 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.212 0.234 0.257 0.28 0.303 0.326 0.349 0.354 0.379 0.421 0.475 0.545 0.626 0.712 0.8 0.887 0.972 1.056 1.138 1.22 1.301 1.382 1.463 1.545 1.627 1.71 1.794 1.878 1.964 2.052 2.14 2.231 2.322 2.416 2.512 2.609 2.709 2.812 2.916 3.024 3.134 3.247 3.364 3.483 3.607 3.734 3.865 4.001 4.142 4.287 4.438 4.595 4.759 4.929 5.107 5.294 5.489 5.695 5.913 6.144 6.39 6.653 6.937 7.246 7.584 7.959 8.378 8.819 9.0 8.998 8.962 8.883 8.766 8.617 8.441 8.242 8.025 7.794 7.552 7.302 7.047 6.79 6.532 6.275 6.021 5.77 5.525 5.285 5.052 4.825 4.606 4.394 4.189 3.992 3.803 3.621 3.447 3.28 3.12 2.968 2.822 2.683 2.55 2.423 2.302 2.187 2.078 1.973 1.874 1.78 1.69 1.605 1.524 1.446 1.373 1.303 1.237 1.174 1.115 1.058 1.004 0.953 0.905 0.858 0.815 0.773 0.734 0.696 0.661 0.627 0.595 0.565 0.536 0.508 0.483 0.458 0.434 0.412 0.391 0.371 0.352 0.334 0.317 0.301 0.286 0.271 0.257 0.244 0.232 0.22 0.208

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="9.0" PeakHeight="513.655" Num="5" zHalfNm="474.484" Error="8.738">
-229.755 -121.653 61.968 -8.944 -4.098
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="101.173" Depth="0.154"/>
<TopsideChapman PeakHeight="513.655" PeakDensity="1004962.75" PeakScaleHeight="29.772" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
