<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-10 -069 22:50:00.000"
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="2 2 0 0 0 0 0 0 0 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.03.10 (069) 22:50:00</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">
FF202606903102250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.692" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.539" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="439.093" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="402.173" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.180" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="57.445" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.430" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="28.556" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="78.510" 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="109">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 382.500 385.000 386.250 387.500 388.750 390.000 390.000 407.500 425.000 427.500 430.000 432.500 435.000 437.500 440.000 442.500 445.000 460.000 467.500 475.000 470.000 470.000 475.000 480.000 485.000 480.000 475.000 470.000 465.000 460.000 455.000 470.000 485.000 477.500 470.000 390.000 405.000 405.000 400.000 395.000 420.000 430.000 440.000 440.000 440.000 445.000 447.500 450.000 445.000 445.000 440.000 440.000 442.500 445.000 447.500 450.000 450.000 450.000 450.000 450.000 452.500 455.000 456.667 458.333 460.000 460.732 461.463 462.195 462.927 463.659 464.390 465.122 465.854 466.585 467.317 468.049 468.780 469.512 470.244 470.976 471.707 472.439 473.171 473.902 474.634 475.366 476.098 476.829 477.561 478.293 479.024 479.756 480.488 481.220 481.951 482.683 483.415 484.146 484.878 485.610 486.341 487.073 487.805 488.537 489.268 490.000 495.000 600.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 60 0 0 0 0 60 0 51 54 0 0 0 0 54 0 60 54 0 57 51 51 0 0 54 0 0 0 0 0 54 0 57 0 0 54 57 0 0 51 51 0 54 0 54 60 0 57 54 57 54 51 57 57 0 51 0 54 57 54 0 54 0 0 54 0 0 0 0 0 0 0 54 0 0 0 0 0 0 0 0 0 48 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 48 0 45 48 51 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-2.734375 0.390625 0.390625 -1.953125 0.390625 -0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 -0.390625 -1.171875 2.734375 1.171875 1.171875 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 1.171875 0.390625 -1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -1.171875 -1.171875 1.171875 -2.734375 -0.390625 0.390625 -1.171875 0.390625 -0.390625 0.390625 0.390625 -1.953125 0.390625 0.390625 -2.734375 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -2.734375 -1.953125 -0.390625 -0.390625 -1.171875 -1.171875 0.390625 1.953125 0.390625 1.171875 -1.171875 0.390625 1.953125 1.953125 -1.171875 -0.390625 0.390625 -1.171875 -1.171875 1.171875 -0.390625 -0.390625 1.171875 -1.171875 0.390625 1.953125 -0.390625 0.390625 1.953125 -0.390625 -2.734375 -0.390625 0.390625 0.390625 0.390625 -1.171875 -1.171875 2.734375 -0.390625 0.390625 1.171875 -1.171875 -0.390625 1.171875 -1.171875 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="151">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.396 145.0 150.0 155.0 160.0 165.0 170.0 175.0 176.793 180.0 185.0 190.0 195.0 200.0 205.0 210.0 210.189 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 439.093 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0
</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 0.308 0.278 0.237 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.238 0.261 0.284 0.307 0.33 0.353 0.354 0.402 0.466 0.542 0.625 0.711 0.797 0.884 0.97 1.056 1.143 1.231 1.321 1.412 1.506 1.602 1.7 1.801 1.906 2.014 2.126 2.243 2.364 2.49 2.622 2.76 2.905 3.057 3.217 3.386 3.565 3.755 3.957 4.172 4.403 4.65 4.916 5.204 5.514 5.85 6.21 6.593 6.989 7.375 7.712 7.938 8.0 7.999 7.968 7.895 7.786 7.646 7.481 7.294 7.09 6.873 6.646 6.413 6.175 5.936 5.697 5.461 5.227 4.998 4.773 4.555 4.343 4.138 3.94 3.749 3.566 3.39 3.221 3.06 2.906 2.758 2.617 2.483 2.356 2.234 2.118 2.008 1.904 1.804 1.71 1.62 1.535 1.455 1.378 1.305 1.236 1.171 1.109 1.051 0.995 0.942 0.892 0.845 0.8 0.758 0.718 0.679 0.643 0.609 0.577 0.546 0.517 0.49 0.464 0.439 0.416 0.393 0.373 0.353 0.334 0.316 0.299 0.283 0.268 0.254 0.241 0.228 0.216 0.204

</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="8.0" PeakHeight="439.093" Num="5" zHalfNm="402.173" Error="7.327">
-179.735 -75.617 28.547 1.682 -3.781
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="100.189" Depth="0.154"/>
<TopsideChapman PeakHeight="439.093" PeakDensity="794044.7" PeakScaleHeight="28.556" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
