<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2o cusp not found, 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" >
2026.03.19 (078) 22:50:00</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">
FF202607803192250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="23" >
<URSI ID="00" Val="8.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.630" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.352" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="440.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="440.000" 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="88" Val="8.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="417.984" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="363.910" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.181" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="81.605" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="15.656" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.627" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="89.610" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.470" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="57">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
440.000 445.000 445.000 445.000 447.500 450.000 451.250 452.500 453.750 455.000 452.500 450.000 450.000 455.000 455.000 455.000 455.000 455.000 455.000 457.500 460.000 460.000 461.429 462.857 464.286 465.714 467.143 468.571 470.000 467.000 464.000 461.000 458.000 455.000 460.000 460.000 460.000 460.000 465.000 468.333 471.667 475.000 475.000 480.000 485.000 485.000 490.000 490.000 495.000 495.000 495.000 495.000 500.000 510.000 515.000 520.000 530.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 66 66 0 69 0 0 0 63 54 57 60 60 0 0 63 0 60 0 57 66 0 60 66 0 0 0 60 0 0 0 0 66 60 0 75 72 69 0 0 72 78 0 63 69 66 66 63 63 60 57 54 60 54 54 51
</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 0.390625 -1.171875 -1.171875 0.390625 -1.953125 0.390625 0.390625 1.171875 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 -0.390625 0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 -1.953125 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 -0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="178">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.557 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.115 180.0 185.0 190.0 195.0 200.0 205.0 210.0 210.672 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 417.984 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0
</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 0.279 0.239 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.236 0.259 0.282 0.305 0.328 0.351 0.354 0.424 0.498 0.575 0.659 0.752 0.855 0.972 1.102 1.246 1.404 1.574 1.755 1.945 2.142 2.344 2.552 2.763 2.978 3.196 3.417 3.64 3.867 4.097 4.33 4.566 4.807 5.05 5.298 5.55 5.807 6.068 6.333 6.602 6.875 7.15 7.425 7.695 7.953 8.185 8.371 8.481 8.5 8.498 8.475 8.429 8.361 8.274 8.17 8.051 7.919 7.776 7.623 7.461 7.294 7.121 6.944 6.764 6.582 6.399 6.216 6.033 5.852 5.672 5.494 5.319 5.146 4.977 4.811 4.649 4.49 4.336 4.185 4.038 3.895 3.757 3.622 3.492 3.365 3.243 3.124 3.009 2.898 2.791 2.687 2.587 2.49 2.397 2.307 2.22 2.136 2.056 1.978 1.903 1.83 1.761 1.694 1.629 1.567 1.507 1.45 1.394 1.341 1.289 1.24 1.192 1.146 1.102 1.06 1.019 0.98 0.942 0.906 0.871 0.838 0.805 0.774 0.744 0.716 0.688 0.662 0.636 0.612 0.588 0.565 0.543 0.522 0.502 0.483 0.464 0.446 0.429 0.412 0.397 0.381 0.367 0.352 0.339 0.326 0.313 0.301 0.289 0.278 0.267 0.257 0.247 0.238 0.228 0.22 0.211 0.203

</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="8.5" PeakHeight="417.984" Num="5" zHalfNm="363.91" Error="4.327">
-188.772 -35.817 25.167 -11.774 3.884
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="100.672" Depth="0.154"/>
<TopsideChapman PeakHeight="417.984" PeakDensity="896402.0" PeakScaleHeight="39.627" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
