<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 20:30:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.03.30 (089) 20:30:00</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">
FF202608903302030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="13.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.763" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="36.609" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="255.000" 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="13.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.673" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.775" 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="349.487" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="286.433" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.631" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="89.542" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.635" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="45.094" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="102.680" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.360" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="208">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0 13.05 13.1 13.15 13.2 13.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 255.000 255.714 256.429 257.143 257.857 258.571 259.286 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 265.000 265.000 265.588 266.176 266.765 267.353 267.941 268.529 269.118 269.706 270.294 270.882 271.471 272.059 272.647 273.235 273.824 274.412 275.000 275.000 275.000 275.000 275.000 275.000 285.000 285.000 285.000 282.500 280.000 285.000 285.833 286.667 287.500 288.333 289.167 290.000 285.000 287.000 289.000 291.000 293.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 305.000 305.000 300.000 305.000 305.000 305.000 305.000 305.000 305.000 308.333 311.667 315.000 310.000 310.625 311.250 311.875 312.500 313.125 313.750 314.375 315.000 316.667 318.333 320.000 322.500 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 337.500 340.000 340.000 340.000 345.000 345.000 345.000 347.500 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 367.500 370.000 370.000 370.000 371.667 373.333 375.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 382.500 385.000 385.000 386.667 388.333 390.000 392.500 395.000 395.000 395.000 390.000 400.000 400.000 402.500 405.000 405.000 405.000 405.000 405.000 405.000 405.000 407.500 410.000 412.500 415.000 415.000 416.667 418.333 420.000 421.667 423.333 425.000 425.000 427.500 430.000 430.000 430.000 431.667 433.333 435.000 435.000 435.000 440.000 443.333 446.667 450.000 450.000 452.500 455.000 455.000 457.500 460.000 460.000 462.584 465.673 469.430 474.097 480.053 487.916 498.777
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 0 51 0 0 0 0 54 57 60 57 0 0 57 0 48 57 63 0 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 60 63 60 0 57 0 0 0 0 63 0 0 0 0 0 0 54 60 0 0 0 0 66 69 72 72 75 72 69 63 66 66 54 60 69 66 66 69 69 69 0 0 0 51 60 0 0 0 0 51 0 0 66 0 0 69 63 69 66 57 0 63 72 0 69 72 69 72 57 72 0 69 72 72 69 69 75 60 66 69 72 75 72 66 63 69 69 66 60 60 63 0 63 63 60 63 66 66 0 63 69 63 0 0 54 57 57 45 0 54 57 51 0 45 54 0 0 51 0 42 0 54 48 42 51 0 45 51 54 0 63 0 63 0 66 54 57 60 0 0 57 0 0 60 63 0 57 60 57 0 0 57 0 0 0 45 0 51 51 0 51 51 0 51 51 0 0 54 51 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" >
89.83 90.0 95.0 100.0 105.0 110.0 115.0 119.499 120.0 125.0 128.998 130.0 135.0 138.497 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 349.487 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.215 1.188 1.537 1.718 1.775 1.738 1.637 1.637 1.637 1.637 1.652 1.724 1.775 1.815 1.945 2.073 2.202 2.335 2.474 2.62 2.776 2.942 3.122 3.315 3.525 3.753 3.999 4.264 4.547 4.847 5.162 5.489 5.825 6.166 6.511 6.858 7.204 7.551 7.896 8.241 8.585 8.928 9.271 9.614 9.957 10.302 10.647 10.994 11.343 11.691 12.038 12.377 12.7 12.982 13.184 13.25 13.25 13.231 13.183 13.108 13.008 12.886 12.743 12.582 12.405 12.213 12.009 11.795 11.571 11.34 11.103 10.86 10.615 10.366 10.116 9.865 9.615 9.365 9.116 8.87 8.626 8.385 8.147 7.913 7.682 7.456 7.235 7.017 6.805 6.597 6.394 6.195 6.002 5.813 5.63 5.451 5.277 5.108 4.944 4.784 4.629 4.478 4.332 4.19 4.053 3.919 3.79 3.665 3.544 3.426 3.312 3.202 3.095 2.992 2.892 2.795 2.701 2.611 2.523 2.438 2.356 2.277 2.2 2.126 2.054 1.985 1.918 1.853 1.79 1.73 1.671 1.614 1.56 1.507 1.456 1.406 1.359 1.313 1.268 1.225 1.183 1.143 1.104 1.067 1.031 0.996 0.962 0.929 0.897 0.867 0.837 0.809 0.781 0.755 0.729 0.704 0.68 0.657 0.635 0.613 0.592 0.572 0.553 0.534 0.516 0.498 0.481 0.465 0.449 0.434 0.419 0.405 0.391 0.378 0.365 0.352 0.34 0.329 0.318 0.307 0.296 0.286 0.277 0.267 0.258 0.249 0.241

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.775" PeakHeight="110.0" Num="3" Error="0.0">
-28.69 10.615 -2.095
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.775" EndFrequency="13.25" PeakHeight="349.487" Num="5" zHalfNm="286.433" Error="4.16">
-170.453 -50.914 16.605 -10.215 3.987
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.497" Depth="0.138"/>
<TopsideChapman PeakHeight="349.487" PeakDensity="2178194.8" PeakScaleHeight="45.094" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
