<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-17 -076 14:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.03.17 (076) 14:00:00</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">
FF202607603171400009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.608" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.772" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="385.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.363" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.348" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="353.319" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="219.043" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.690" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="177.609" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.316" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="97.613" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="200.350" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.750" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="82">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 310.000 310.000 315.000 312.500 310.000 310.000 310.000 310.000 310.000 310.000 311.250 312.500 313.750 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 325.000 330.000 330.000 330.000 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 360.000 360.000 365.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 395.000 400.000 405.000 405.000 410.000 415.000 420.000 435.000 440.000 445.000 445.000 450.000 465.000 470.000 475.000 475.000 480.000 490.000 495.000 505.000 510.000 520.000 525.000 535.000 545.000 560.000 570.000 583.913 599.431 616.850 636.542 658.982 684.789
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 51 51 0 57 57 51 0 54 54 0 0 0 54 54 54 54 57 57 57 0 0 54 48 0 54 57 57 54 57 48 60 45 54 51 60 51 60 54 63 60 57 66 63 57 60 60 60 57 60 57 57 57 60 63 54 57 60 60 60 51 51 51 60 60 60 57 60 60 57 54 54 51 51 48 51 48 45 48 0 42
</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 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 1.171875 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 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.487 90.0 95.0 100.0 105.0 110.0 111.662 113.324 114.986 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 353.319 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.262 2.91 3.253 3.363 3.24 3.24 3.363 3.364 3.538 3.688 3.829 3.967 4.105 4.244 4.387 4.534 4.686 4.844 5.007 5.175 5.347 5.524 5.702 5.882 6.061 6.238 6.412 6.582 6.749 6.911 7.069 7.222 7.371 7.516 7.656 7.793 7.926 8.055 8.18 8.302 8.421 8.535 8.646 8.753 8.856 8.954 9.048 9.135 9.216 9.289 9.353 9.407 9.45 9.48 9.497 9.5 9.5 9.496 9.487 9.474 9.456 9.435 9.409 9.379 9.346 9.309 9.269 9.226 9.179 9.13 9.078 9.023 8.966 8.906 8.844 8.781 8.715 8.647 8.578 8.507 8.435 8.361 8.286 8.21 8.133 8.054 7.976 7.896 7.815 7.735 7.653 7.571 7.489 7.406 7.324 7.241 7.158 7.075 6.991 6.908 6.826 6.743 6.66 6.578 6.496 6.414 6.333 6.252 6.171 6.091 6.012 5.933 5.854 5.776 5.699 5.622 5.546 5.47 5.395 5.321 5.247 5.174 5.102 5.031 4.96 4.89 4.82 4.751 4.684 4.616 4.55 4.484 4.419 4.355 4.292 4.229 4.167 4.106 4.045 3.985 3.926 3.868 3.811 3.754 3.698 3.642 3.588 3.534 3.481 3.428 3.377 3.325 3.275 3.225 3.176 3.128 3.08 3.033 2.987 2.941 2.896 2.852 2.808 2.765 2.723 2.681 2.639 2.599 2.558 2.519 2.48 2.442 2.404 2.366 2.33 2.294 2.258 2.223 2.188 2.154 2.121 2.088 2.055 2.023 1.991 1.96

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.363" PeakHeight="110.0" Num="3" Error="0.0">
-30.481 13.122 -3.154
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.363" EndFrequency="9.5" PeakHeight="353.319" Num="5" zHalfNm="219.043" Error="6.837">
-225.733 -19.818 10.598 -6.77 3.39
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.986" Depth="0.123"/>
<TopsideChapman PeakHeight="353.319" PeakDensity="1119727.0" PeakScaleHeight="97.613" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
