<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-03 -093 19:50:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: 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" >
2026.04.03 (093) 19:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609304031950009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.853" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.387" 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="11.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="446.733" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.286" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="333.164" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="269.260" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.864" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="85.847" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="30.537" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="44.871" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="109.660" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.150" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="163">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 245.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 250.000 247.500 245.000 245.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 256.667 258.333 260.000 260.000 261.250 262.500 263.750 265.000 267.500 270.000 271.667 273.333 275.000 275.000 275.000 276.250 277.500 278.750 280.000 281.250 282.500 283.750 285.000 286.250 287.500 288.750 290.000 291.250 292.500 293.750 295.000 297.500 300.000 302.500 305.000 310.000 310.000 311.250 312.500 313.750 315.000 316.250 317.500 318.750 320.000 320.000 320.000 322.500 325.000 325.000 330.000 330.000 330.000 330.000 332.500 335.000 336.250 337.500 338.750 340.000 340.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 365.000 365.000 365.000 365.000 367.500 370.000 372.500 375.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 387.500 390.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 417.500 420.000 420.000 420.000 420.000 425.000 430.000 430.000 432.500 435.000 435.318 435.684 436.109 436.611 437.210 437.939 438.844 440.000 441.526 443.633 446.733 451.743 461.215 485.895
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 60 60 60 60 63 60 60 63 48 0 63 63 63 66 66 66 60 63 63 54 57 54 0 0 66 69 51 69 0 69 0 66 0 0 69 66 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 69 0 0 0 72 0 0 0 0 0 63 0 0 0 60 63 69 0 63 66 54 0 60 66 51 57 0 45 0 60 66 51 0 63 66 69 60 0 69 54 63 66 48 72 63 69 69 63 66 72 72 0 69 54 60 63 69 69 60 63 69 57 0 66 0 60 63 69 54 60 66 69 57 63 69 66 60 63 0 66 63 66 0 63 63 63 0 60 60 0 63 60 51 57 0 51 57 60 54 57 54 57 0 42 51 0 0 42 54 0
</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 -1.953125 -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 -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 2.734375 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 1.953125 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -2.734375 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -2.734375 -1.171875 -0.390625 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="184">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.687 90.0 95.0 100.0 105.0 110.0 115.0 116.676 120.0 123.351 125.0 130.0 130.027 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 333.164 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.227 1.534 1.979 2.212 2.286 2.215 2.159 2.159 2.159 2.19 2.285 2.286 2.385 2.489 2.598 2.713 2.834 2.963 3.1 3.246 3.403 3.57 3.749 3.94 4.143 4.356 4.58 4.813 5.052 5.297 5.546 5.797 6.049 6.302 6.555 6.807 7.06 7.312 7.563 7.815 8.068 8.322 8.578 8.836 9.097 9.362 9.632 9.907 10.187 10.468 10.74 10.952 11.0 10.998 10.976 10.929 10.861 10.772 10.665 10.541 10.402 10.251 10.088 9.915 9.733 9.544 9.35 9.15 8.947 8.741 8.533 8.324 8.115 7.906 7.698 7.491 7.286 7.083 6.883 6.686 6.492 6.301 6.114 5.931 5.751 5.575 5.403 5.236 5.072 4.913 4.757 4.606 4.459 4.315 4.176 4.041 3.909 3.782 3.658 3.538 3.421 3.308 3.199 3.093 2.99 2.89 2.794 2.7 2.61 2.522 2.438 2.356 2.276 2.2 2.125 2.054 1.984 1.917 1.852 1.79 1.729 1.67 1.613 1.559 1.506 1.455 1.405 1.357 1.311 1.266 1.223 1.182 1.141 1.102 1.065 1.028 0.993 0.959 0.927 0.895 0.865 0.835 0.807 0.779 0.752 0.727 0.702 0.678 0.655 0.632 0.611 0.59 0.57 0.55 0.531 0.513 0.496 0.479 0.462 0.446 0.431 0.416 0.402 0.388 0.375 0.362 0.35 0.338 0.326 0.315 0.304 0.294 0.284 0.274 0.265 0.256 0.247 0.239 0.23 0.223 0.215 0.208 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.286" PeakHeight="110.0" Num="3" Error="0.0">
-29.463 11.658 -2.508
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.286" EndFrequency="11.0" PeakHeight="333.164" Num="5" zHalfNm="269.26" Error="2.703">
-151.877 -62.16 18.779 -10.33 2.451
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="20.027" Depth="0.127"/>
<TopsideChapman PeakHeight="333.164" PeakDensity="1501240.8" PeakScaleHeight="44.871" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
