<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 20:10:00.000"
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" >
2026.03.23 (082) 20:10:00</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">
FF202608203232010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.664" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.970" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.107" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="371.944" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="269.051" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.686" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="144.716" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="58.097" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.995" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="135.720" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.450" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="184">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 250.000 250.000 250.000 250.000 251.250 252.500 253.750 255.000 255.000 255.000 255.714 256.429 257.143 257.857 258.571 259.286 260.000 260.000 261.667 263.333 265.000 265.500 266.000 266.500 267.000 267.500 268.000 268.500 269.000 269.500 270.000 270.000 270.833 271.667 272.500 273.333 274.167 275.000 275.000 275.000 280.000 277.500 275.000 277.000 279.000 281.000 283.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 287.500 290.000 290.000 290.000 290.000 290.000 290.000 290.833 291.667 292.500 293.333 294.167 295.000 295.625 296.250 296.875 297.500 298.125 298.750 299.375 300.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 312.000 314.000 316.000 318.000 320.000 320.000 320.000 321.667 323.333 325.000 325.000 326.667 328.333 330.000 330.000 330.000 330.000 332.500 335.000 335.000 335.000 337.500 340.000 340.000 340.000 340.000 342.500 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 395.000 395.000 397.500 400.000 405.000 405.000 410.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 445.000 445.000 450.000 460.000 460.000 465.000 470.000 475.000 481.307 488.177 495.690 503.941 513.044 523.138 534.394 547.025 561.300 577.561 596.254 617.970 643.505 673.964
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 0 0 57 0 0 0 63 60 57 0 54 0 0 0 0 63 57 0 0 57 0 57 0 0 0 0 0 0 0 63 57 0 54 0 0 0 66 69 66 66 0 54 0 0 63 0 66 66 0 69 69 66 66 0 69 60 75 75 72 69 0 60 0 0 0 66 0 0 0 0 0 0 0 63 75 75 75 75 75 78 78 0 0 0 0 60 66 69 0 57 63 69 0 51 60 66 66 75 54 66 69 75 54 63 63 72 75 57 66 69 69 75 63 66 72 75 66 69 57 63 69 72 75 66 69 69 72 66 69 57 63 66 54 60 66 66 66 66 66 60 66 57 63 63 57 63 54 60 54 60 60 60 54 60 57 57 57 57 57 57 57 54 48 57 63 63 63 63 60 57 54 54 51 51 51 51 51 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
89.731 90.0 95.0 100.0 105.0 110.0 115.0 117.626 120.0 125.0 125.251 130.0 132.877 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 371.944 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.223 1.413 1.825 2.039 2.107 2.052 1.977 1.977 1.977 1.977 2.058 2.107 2.161 2.284 2.402 2.521 2.642 2.766 2.895 3.03 3.173 3.325 3.488 3.663 3.853 4.06 4.287 4.535 4.806 5.101 5.42 5.758 6.111 6.473 6.837 7.198 7.551 7.895 8.226 8.545 8.85 9.143 9.423 9.689 9.943 10.184 10.411 10.626 10.827 11.014 11.187 11.345 11.488 11.614 11.723 11.815 11.889 11.945 11.981 11.999 12.0 11.998 11.987 11.968 11.939 11.902 11.856 11.804 11.744 11.677 11.604 11.525 11.441 11.351 11.256 11.157 11.054 10.947 10.836 10.722 10.605 10.486 10.364 10.24 10.115 9.987 9.859 9.729 9.598 9.466 9.334 9.201 9.068 8.935 8.802 8.67 8.537 8.405 8.273 8.142 8.012 7.882 7.753 7.625 7.499 7.373 7.248 7.125 7.003 6.882 6.762 6.644 6.527 6.412 6.298 6.185 6.074 5.964 5.856 5.75 5.645 5.541 5.439 5.338 5.239 5.142 5.046 4.951 4.858 4.767 4.677 4.588 4.501 4.416 4.331 4.249 4.167 4.087 4.009 3.932 3.856 3.781 3.708 3.636 3.566 3.496 3.428 3.362 3.296 3.232 3.168 3.106 3.045 2.986 2.927 2.87 2.813 2.758 2.703 2.65 2.598 2.547 2.496 2.447 2.398 2.351 2.304 2.259 2.214 2.17 2.127 2.085 2.043 2.003 1.963 1.924 1.885 1.848 1.811 1.775 1.74 1.705 1.671 1.638 1.605 1.573 1.542

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.107" PeakHeight="110.0" Num="3" Error="0.0">
-29.225 11.33 -2.374
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.107" EndFrequency="12.0" PeakHeight="371.944" Num="5" zHalfNm="269.051" Error="5.626">
-229.112 -1.273 -9.447 -2.324 3.089
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="22.877" Depth="0.13"/>
<TopsideChapman PeakHeight="371.944" PeakDensity="1786600.5" PeakScaleHeight="76.995" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
