<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-08 -098 09:50:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2o cusp not found, Multiple candidates for F2x cusp, 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" >
2026.04.08 (098) 09:50:00</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">
FF202609804080950009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.705" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.039" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="420.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="420.000" 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="0.650" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="441.323" 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="2.059" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="336.758" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="229.864" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.659" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="139.362" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.375" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.802" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="167.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.520" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
420.000 422.500 425.000 427.500 430.000 432.500 435.000 435.000 435.000 435.000 432.500 430.000 427.500 434.019 441.323 449.565 458.937 469.687 482.145 496.753 514.120 535.108 560.982 593.674
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
12 0 0 0 0 0 0 0 0 0 0 0 0 0 15 0 0 0 0 0 12 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 0.390625 0.390625 0.390625 1.953125 0.390625 2.734375 0.390625 0.390625 -2.734375 0.390625 0.390625 2.734375 -0.390625 2.734375 2.734375 0.390625 0.390625 0.390625 0.390625 1.953125 -1.953125 -2.734375 -2.734375
</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" >
89.743 90.0 95.0 100.0 105.0 110.0 115.0 117.886 120.0 125.0 125.773 130.0 133.659 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 336.758 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.222 1.38 1.783 1.993 2.059 2.007 1.928 1.928 1.928 1.928 1.998 2.059 2.087 2.195 2.311 2.432 2.559 2.689 2.822 2.956 3.09 3.223 3.354 3.485 3.613 3.739 3.863 3.986 4.106 4.225 4.342 4.458 4.572 4.685 4.796 4.906 5.015 5.123 5.229 5.334 5.437 5.539 5.638 5.734 5.828 5.917 6.001 6.078 6.148 6.206 6.253 6.284 6.299 6.3 6.299 6.293 6.282 6.267 6.247 6.223 6.195 6.164 6.128 6.09 6.048 6.003 5.956 5.906 5.853 5.799 5.742 5.684 5.624 5.562 5.499 5.435 5.37 5.304 5.237 5.169 5.1 5.032 4.962 4.893 4.823 4.753 4.683 4.613 4.543 4.473 4.404 4.334 4.265 4.197 4.129 4.061 3.994 3.927 3.861 3.795 3.731 3.666 3.603 3.54 3.478 3.417 3.356 3.296 3.237 3.179 3.121 3.064 3.008 2.953 2.899 2.845 2.792 2.74 2.689 2.639 2.589 2.541 2.493 2.445 2.399 2.353 2.308 2.264 2.221 2.178 2.136 2.095 2.055 2.015 1.976 1.938 1.9 1.863 1.827 1.791 1.756 1.722 1.688 1.655 1.622 1.59 1.559 1.528 1.498 1.469 1.44 1.411 1.383 1.356 1.329 1.303 1.277 1.252 1.227 1.202 1.179 1.155 1.132 1.11 1.088 1.066 1.045 1.024 1.003 0.983 0.964 0.944 0.926 0.907 0.889 0.871 0.854 0.837 0.82 0.804 0.787 0.772 0.756 0.741 0.726 0.712 0.697

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.059" PeakHeight="110.0" Num="3" Error="0.0">
-29.157 11.236 -2.336
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.059" EndFrequency="6.3" PeakHeight="336.758" Num="5" zHalfNm="229.864" Error="3.571">
-187.093 -25.988 14.454 -4.924 0.452
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="23.659" Depth="0.131"/>
<TopsideChapman PeakHeight="336.758" PeakDensity="492431.75" PeakScaleHeight="76.802" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
