<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-22 -053 16:40:00.000"
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: 100%</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" >
2026.02.22 (053) 16:40:00</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">
FF202605302221640009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.555" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.125" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" 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="3.314" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.325" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="366.115" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.723" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.980" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="128.865" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.780" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="73.070" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="166.760" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.290" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="131">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 275.000 280.000 285.000 290.000 295.000 300.000 303.889 307.778 311.667 315.556 319.444 323.333 327.222 331.111 335.000 335.000 335.000 337.500 340.000 340.000 340.000 340.000 345.000 346.667 348.333 350.000 350.000 350.000 350.000 350.000 351.250 352.500 353.750 355.000 355.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 370.000 370.000 372.500 375.000 377.500 380.000 380.000 385.000 385.000 385.000 385.000 387.500 390.000 390.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 412.500 415.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 437.500 440.000 445.000 445.000 445.000 450.000 450.000 452.500 455.000 455.000 455.000 460.000 465.000 465.000 470.000 475.000 475.000 480.000 485.000 485.000 490.000 495.000 495.000 500.000 504.162 508.782 513.943 519.743 526.311 533.808 542.448 552.514 564.389 578.609 595.947 617.553
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 0 0 0 48 45 45 0 0 0 0 0 0 0 0 45 54 54 0 45 48 51 48 51 0 0 51 51 54 54 54 0 0 0 57 60 0 63 60 51 0 48 60 63 60 48 57 57 60 60 63 66 0 66 60 0 0 0 60 66 51 57 60 63 0 57 66 54 57 63 63 63 54 57 48 54 60 66 63 66 0 63 66 66 60 63 57 63 69 63 66 63 54 57 51 57 45 51 60 51 54 0 57 57 54 0 54 51 51 45 48 48 51 51 51 51 45 48 48 42 45 0 0 0 0 42 42 42 0 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 2.734375 2.734375 2.734375 0.390625 -0.390625 0.390625 -1.171875 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 -1.171875 -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 -1.953125 -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 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 1.953125 1.953125 1.171875 1.953125 -1.953125
</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" >
89.495 90.0 95.0 100.0 105.0 110.0 111.865 113.729 115.0 115.594 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 366.115 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.229 2.868 3.206 3.314 3.191 3.191 3.275 3.314 3.458 3.604 3.741 3.873 4.002 4.129 4.256 4.383 4.511 4.64 4.771 4.904 5.04 5.178 5.319 5.464 5.612 5.764 5.919 6.079 6.243 6.41 6.583 6.759 6.94 7.126 7.315 7.509 7.707 7.909 8.114 8.322 8.533 8.746 8.961 9.176 9.392 9.607 9.821 10.03 10.236 10.434 10.623 10.8 10.961 11.104 11.222 11.314 11.373 11.399 11.4 11.397 11.384 11.361 11.33 11.289 11.241 11.184 11.12 11.05 10.973 10.89 10.801 10.707 10.608 10.505 10.398 10.287 10.173 10.055 9.935 9.813 9.688 9.562 9.434 9.305 9.174 9.043 8.91 8.778 8.645 8.512 8.378 8.245 8.113 7.98 7.848 7.717 7.587 7.457 7.329 7.201 7.075 6.949 6.825 6.702 6.581 6.461 6.342 6.225 6.109 5.994 5.882 5.77 5.661 5.552 5.446 5.341 5.238 5.136 5.036 4.937 4.84 4.745 4.651 4.559 4.469 4.379 4.292 4.206 4.122 4.039 3.957 3.877 3.799 3.722 3.646 3.572 3.499 3.428 3.358 3.289 3.221 3.155 3.09 3.027 2.964 2.903 2.843 2.784 2.727 2.67 2.615 2.561 2.507 2.455 2.404 2.354 2.305 2.257 2.21 2.164 2.119 2.074 2.031 1.989 1.947 1.906 1.866 1.827 1.789 1.751 1.715 1.679 1.643 1.609 1.575 1.542 1.51 1.478 1.447 1.416 1.387 1.357 1.329 1.301 1.273 1.247

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.314" PeakHeight="110.0" Num="3" Error="0.0">
-30.446 13.07 -3.129
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.314" EndFrequency="11.4" PeakHeight="366.115" Num="5" zHalfNm="268.723" Error="4.644">
-204.434 -56.009 7.629 0.994 1.299
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.594" Depth="0.123"/>
<TopsideChapman PeakHeight="366.115" PeakDensity="1612407.0" PeakScaleHeight="73.07" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
