<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 21:50:00.000"
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 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" >
2026.03.30 (089) 21:50:00</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">
FF202608903302150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.592" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.582" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="512.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.376" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="407.193" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="343.869" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.939" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="93.817" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.730" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.893" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="94.820" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.880" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="189">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.4 2.45 2.5 2.55 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 300.000 301.667 303.333 305.000 300.000 300.000 301.250 302.500 303.750 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.833 311.667 312.500 313.333 314.167 315.000 315.000 315.000 315.000 315.000 315.000 316.667 318.333 320.000 321.667 323.333 325.000 325.000 325.000 325.000 325.000 326.667 328.333 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 335.000 337.500 340.000 341.667 343.333 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 356.250 357.500 358.750 360.000 360.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 397.500 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 427.500 430.000 435.000 435.000 435.000 435.000 440.000 441.667 443.333 445.000 446.667 448.333 450.000 450.000 450.000 455.000 455.000 455.000 455.000 460.000 465.000 465.000 465.000 466.667 468.333 470.000 475.000 475.000 485.000 485.000 487.500 490.000 495.000 495.000 495.000 497.500 500.000 503.000 506.000 509.000 512.000 515.000 519.665 525.378 532.538 541.776 554.147
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 0 0 0 60 54 0 0 0 60 0 60 54 0 0 0 0 60 63 0 0 0 0 0 66 69 66 0 0 69 0 0 0 0 0 63 69 48 0 54 0 0 60 63 66 0 0 72 75 0 72 66 72 0 75 60 0 0 60 69 0 69 0 0 54 0 66 69 72 57 0 0 66 0 66 69 0 69 66 0 51 0 60 0 66 0 69 54 60 63 66 66 69 66 63 63 69 0 69 63 63 66 69 60 60 66 69 57 63 66 72 69 72 66 66 66 69 66 66 51 57 63 66 66 69 66 69 66 60 63 51 57 60 66 66 66 66 66 66 63 66 0 63 54 0 0 60 54 0 0 0 0 0 57 60 57 54 0 54 48 0 54 54 48 0 0 45 51 45 42 48 0 51 42 48 51 0 51 0 45 0 0 45 42 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 -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 -2.734375 -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 -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 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 2.734375 1.171875 -1.953125 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -2.734375 -1.171875 -0.390625 -1.953125 -1.953125 1.953125 1.171875 1.953125 -1.953125 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.065 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.669 140.0 145.0 150.0 155.0 160.0 165.0 169.338 170.0 175.0 180.0 185.0 190.0 195.0 199.007 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 407.193 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.248 0.326 0.364 0.376 0.372 0.36 0.34 0.309 0.263 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.204 0.234 0.263 0.293 0.323 0.352 0.376 0.399 0.492 0.579 0.67 0.769 0.881 1.008 1.155 1.325 1.521 1.745 1.997 2.276 2.578 2.899 3.234 3.579 3.933 4.292 4.656 5.024 5.395 5.768 6.144 6.523 6.903 7.284 7.666 8.048 8.43 8.81 9.185 9.555 9.916 10.264 10.595 10.901 11.177 11.413 11.6 11.729 11.793 11.8 11.796 11.769 11.719 11.647 11.556 11.446 11.32 11.179 11.026 10.86 10.685 10.501 10.31 10.112 9.909 9.702 9.492 9.28 9.066 8.851 8.636 8.422 8.208 7.997 7.787 7.579 7.374 7.171 6.972 6.776 6.583 6.394 6.209 6.028 5.85 5.677 5.508 5.342 5.181 5.023 4.87 4.72 4.575 4.433 4.296 4.162 4.032 3.905 3.782 3.663 3.547 3.435 3.326 3.22 3.117 3.018 2.921 2.827 2.737 2.649 2.563 2.481 2.401 2.323 2.248 2.175 2.105 2.037 1.971 1.907 1.845 1.785 1.727 1.671 1.616 1.564 1.513 1.464 1.416 1.37 1.325 1.282 1.24 1.199 1.16 1.122 1.086 1.05 1.016 0.983 0.951 0.92 0.889 0.86 0.832 0.805 0.779 0.753 0.729 0.705 0.682 0.659 0.638 0.617 0.597 0.577 0.558 0.54 0.522 0.505 0.489 0.473 0.457 0.442 0.428 0.414 0.4 0.387 0.374

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.376" PeakHeight="110.0" Num="3" Error="0.0">
-19.523 2.766 -0.178
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.376" EndFrequency="11.8" PeakHeight="407.193" Num="5" zHalfNm="343.869" Error="4.832">
-205.005 -10.531 11.371 -8.005 3.984
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="89.007" Depth="0.176"/>
<TopsideChapman PeakHeight="407.193" PeakDensity="1727543.4" PeakScaleHeight="46.893" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
