<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-26 -057 07:10:00.000"
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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.02.26 (057) 07:10:00</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">
FF202605702260710009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.021" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.260" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="372.323" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="339.210" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="278.104" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="2.176" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="86.775" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.947" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.234" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="73.370" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.840" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="104">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 265.000 265.000 265.000 265.000 260.000 260.000 266.250 272.500 278.750 285.000 286.250 287.500 288.750 290.000 295.000 296.364 297.727 299.091 300.455 301.818 303.182 304.545 305.909 307.273 308.636 310.000 311.364 312.727 314.091 315.455 316.818 318.182 319.545 320.909 322.273 323.636 325.000 322.500 320.000 322.500 325.000 320.000 322.500 325.000 325.000 325.000 320.000 317.500 315.000 315.000 315.000 315.000 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 340.000 345.000 347.500 350.000 352.500 355.000 357.500 360.000 361.846 363.940 366.333 369.097 372.323 376.140 380.724 386.333 393.356 402.401 414.492 431.478 457.083 500.103 587.452
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 0 69 69 66 72 75 66 63 63 0 0 75 0 0 0 0 66 75 69 0 63 0 66 63 60 0 0 57 60 0 0 0 72 66 0 63 0 0 0 63 0 60 0 0 0 66 60 0 0 0 0 57 0 0 57 57 0 60 0 69 66 0 63 54 63 0 0 66 66 0 63 57 66 66 60 0 66 69 60 60 63 57 69 63 66 72 63 60 66 66 63 60 63 66 66 57 0 60 54 63 51 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 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 1.171875 1.171875 1.171875 1.171875 -0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 1.953125 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 -0.390625 -1.171875 0.390625 1.171875 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="177">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.033 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.066 180.0 185.0 190.0 195.0 200.0 205.0 210.0 212.099 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 339.21 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0
</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 0.4 0.497 0.623 0.787 1.004 1.295 1.686 2.198 2.816 3.473 4.102 4.668 5.167 5.603 5.983 6.314 6.601 6.849 7.06 7.239 7.386 7.504 7.593 7.655 7.691 7.7 7.7 7.689 7.661 7.619 7.562 7.494 7.414 7.324 7.224 7.117 7.003 6.882 6.757 6.627 6.493 6.356 6.218 6.077 5.936 5.794 5.652 5.51 5.369 5.228 5.089 4.952 4.816 4.682 4.55 4.42 4.293 4.168 4.045 3.925 3.808 3.694 3.582 3.473 3.366 3.262 3.161 3.063 2.967 2.874 2.783 2.695 2.61 2.527 2.446 2.368 2.292 2.218 2.146 2.077 2.01 1.945 1.882 1.82 1.761 1.704 1.648 1.594 1.542 1.491 1.443 1.395 1.349 1.305 1.262 1.221 1.18 1.141 1.104 1.067 1.032 0.998 0.965 0.933 0.902 0.873 0.844 0.816 0.789 0.763 0.737 0.713 0.689 0.667 0.644 0.623 0.602 0.582 0.563 0.544 0.526 0.509 0.492 0.476 0.46 0.445 0.43 0.416 0.402 0.388 0.376 0.363 0.351 0.339 0.328 0.317 0.307 0.297 0.287 0.277 0.268 0.259 0.25 0.242 0.234 0.226 0.219 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="7.7" PeakHeight="339.21" Num="5" zHalfNm="278.104" Error="3.222">
-151.177 38.468 -17.968 4.139 -0.573
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="102.099" Depth="0.154"/>
<TopsideChapman PeakHeight="339.21" PeakDensity="735607.94" PeakScaleHeight="46.234" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
