<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-24 -055 23:10:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: F2x 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" >
2026.02.24 (055) 23:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605502242310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.536" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.933" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="400.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="400.000" 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="8.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="537.208" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="460.041" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="406.672" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.354" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="83.105" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.391" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="38.615" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="100.230" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="93">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
400.000 405.000 405.000 407.083 409.167 411.250 413.333 415.417 417.500 419.583 421.667 423.750 425.833 427.917 430.000 430.000 430.000 432.000 434.000 436.000 438.000 440.000 440.000 440.000 441.500 443.000 444.500 446.000 447.500 449.000 450.500 452.000 453.500 455.000 475.000 480.000 485.000 485.000 485.000 485.000 490.000 490.000 490.000 485.000 490.000 470.000 495.000 485.000 492.500 500.000 506.667 513.333 520.000 525.000 550.000 550.000 550.000 555.000 560.000 558.750 557.500 556.250 555.000 553.750 552.500 551.250 550.000 548.750 547.500 546.250 545.000 543.750 542.500 541.250 540.000 538.750 537.500 536.250 535.000 533.750 532.500 531.250 530.000 530.427 530.945 531.590 532.413 533.499 535.000 537.208 540.777 547.527 565.128
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 66 0 0 72 0 0 66 63 0 0 0 0 63 66 57 0 0 0 0 66 63 66 0 0 60 0 0 0 51 0 0 60 54 51 54 60 60 63 60 0 51 60 57 66 54 66 0 54 0 0 60 63 54 0 54 60 51 0 0 0 0 0 0 0 0 0 0 0 0 0 54 0 0 48 60 57 57 54 57 54 57 54 60 54 54 54 54 0 0 51 51
</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 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 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 0.390625 -0.390625 -0.390625 1.953125 -0.390625 -1.171875 2.734375 -0.390625 -0.390625 -1.953125 2.734375 -1.953125 -0.390625 2.734375 2.734375 1.953125 2.734375 1.171875 2.734375 1.171875 0.390625 2.734375 -2.734375 -2.734375 -0.390625 -0.390625 1.171875 1.171875 2.734375 2.734375 2.734375 1.171875 1.171875 1.171875 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125 -0.390625 -0.390625
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.027 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.055 180.0 185.0 190.0 195.0 200.0 205.0 210.0 212.082 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 460.041 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.33 0.31 0.282 0.243 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.209 0.231 0.254 0.277 0.299 0.322 0.345 0.354 0.399 0.47 0.543 0.619 0.703 0.794 0.893 1.001 1.117 1.241 1.37 1.505 1.644 1.786 1.932 2.079 2.228 2.379 2.532 2.686 2.841 2.998 3.157 3.317 3.479 3.643 3.809 3.978 4.148 4.322 4.498 4.678 4.86 5.047 5.237 5.431 5.631 5.835 6.045 6.261 6.484 6.715 6.954 7.202 7.461 7.73 8.008 8.287 8.534 8.65 8.65 8.636 8.597 8.534 8.449 8.346 8.225 8.091 7.943 7.785 7.618 7.444 7.264 7.079 6.891 6.701 6.51 6.319 6.129 5.939 5.751 5.566 5.384 5.204 5.028 4.856 4.687 4.523 4.362 4.206 4.055 3.907 3.764 3.625 3.491 3.361 3.235 3.113 2.996 2.882 2.772 2.666 2.564 2.466 2.371 2.279 2.191 2.106 2.025 1.946 1.87 1.797 1.727 1.659 1.594 1.532 1.472 1.414 1.359 1.305 1.254 1.204 1.157 1.111 1.068 1.025 0.985 0.946 0.909 0.873 0.838 0.805 0.773 0.743 0.713 0.685 0.658 0.632 0.607 0.583 0.56 0.538 0.516 0.496 0.476 0.457 0.439 0.422 0.405 0.389 0.374 0.359 0.345 0.331 0.318 0.305 0.293 0.282 0.27 0.26 0.249 0.24 0.23 0.221 0.212 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.65" PeakHeight="460.041" Num="5" zHalfNm="406.672" Error="5.674">
-213.444 -67.99 47.908 -19.367 4.934
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="102.082" Depth="0.154"/>
<TopsideChapman PeakHeight="460.041" PeakDensity="928318.9" PeakScaleHeight="38.615" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
