<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-12 -071 21:50:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</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" >
2026.03.12 (071) 21:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607103122150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.528" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.003" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="512.481" 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="0.430" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="430.889" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="368.713" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.937" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="92.164" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="20.821" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.740" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="99.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.480" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="133">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.833 356.667 357.500 358.333 359.167 360.000 360.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 370.000 371.000 372.000 373.000 374.000 375.000 375.000 375.000 375.000 376.000 377.000 378.000 379.000 380.000 382.500 385.000 385.000 386.667 388.333 390.000 391.250 392.500 393.750 395.000 390.000 392.500 395.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 400.000 402.500 405.000 407.500 410.000 407.500 405.000 408.333 411.667 415.000 415.000 415.000 415.000 416.364 417.727 419.091 420.455 421.818 423.182 424.545 425.909 427.273 428.636 430.000 435.000 435.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 450.000 450.000 455.000 455.000 455.000 455.000 460.000 460.000 465.000 465.000 465.000 467.500 470.000 470.000 475.000 475.000 480.000 480.000 485.000 485.000 485.000 487.500 490.000 495.000 495.000 495.000 500.000 500.000 505.000 505.000 510.000 512.481 515.379 518.809 522.932 527.982 534.309 542.471 553.400 568.788 592.069
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0 0 0 0 0 66 0 0 0 0 0 69 66 66 69 54 69 69 69 69 72 0 0 0 0 69 69 69 69 0 0 0 0 72 0 63 0 0 0 57 0 0 0 51 69 0 63 0 66 57 60 0 66 69 69 0 66 0 60 66 69 0 0 63 0 72 69 0 0 0 0 57 0 0 0 0 0 69 57 63 0 0 72 69 72 63 66 69 60 63 69 72 63 69 72 69 69 72 60 63 69 0 63 66 60 66 57 60 51 60 63 0 60 54 63 66 60 63 57 63 57 63 57 45 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 1.171875 -2.734375 2.734375 0.390625 2.734375 1.953125 0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.288 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.889 140.0 145.0 150.0 155.0 160.0 165.0 167.779 170.0 175.0 180.0 185.0 190.0 195.0 196.668 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 430.889 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.284 0.372 0.416 0.43 0.425 0.409 0.382 0.34 0.276 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.218 0.257 0.297 0.337 0.377 0.417 0.43 0.483 0.56 0.639 0.72 0.804 0.893 0.986 1.085 1.189 1.298 1.414 1.536 1.665 1.801 1.944 2.095 2.253 2.419 2.593 2.775 2.966 3.165 3.373 3.59 3.816 4.05 4.293 4.545 4.805 5.073 5.349 5.632 5.921 6.214 6.511 6.81 7.108 7.403 7.69 7.966 8.226 8.463 8.672 8.846 8.978 9.064 9.099 9.1 9.093 9.068 9.024 8.964 8.889 8.801 8.7 8.588 8.467 8.337 8.199 8.055 7.905 7.751 7.593 7.432 7.268 7.104 6.938 6.772 6.606 6.44 6.275 6.112 5.95 5.79 5.632 5.476 5.323 5.172 5.024 4.879 4.737 4.597 4.461 4.328 4.198 4.072 3.948 3.827 3.71 3.595 3.484 3.376 3.27 3.168 3.068 2.972 2.878 2.787 2.698 2.612 2.529 2.448 2.37 2.294 2.22 2.149 2.079 2.012 1.947 1.884 1.823 1.764 1.707 1.652 1.598 1.546 1.496 1.447 1.4 1.354 1.31 1.267 1.226 1.186 1.147 1.11 1.073 1.038 1.004 0.971 0.939 0.909 0.879 0.85 0.822 0.795 0.769 0.744 0.72 0.696 0.673 0.651 0.63 0.609 0.589 0.57 0.551 0.533 0.515 0.498 0.482 0.466 0.451 0.436 0.422 0.408 0.395 0.382 0.369 0.357 0.345 0.334

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.43" PeakHeight="110.0" Num="3" Error="0.0">
-20.952 3.512 -0.272
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.43" EndFrequency="9.1" PeakHeight="430.889" Num="5" zHalfNm="368.713" Error="2.35">
-212.76 -34.459 13.668 -1.197 0.527
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="86.668" Depth="0.23"/>
<TopsideChapman PeakHeight="430.889" PeakDensity="1027419.4" PeakScaleHeight="46.74" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
