<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 18:50:00.000"
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="15.0">
<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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.10.16 (289) 18:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202628910161850009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.497" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.216" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.600" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.710" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="89.221" Name="h`E" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="540.000" 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="2.665" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="393.105" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="289.289" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.351" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="146.741" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.040" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.041" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="162.130" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.560" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="100">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 340.000 345.000 342.500 340.000 345.000 347.500 350.000 347.500 345.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 355.000 357.467 359.933 362.400 364.867 367.333 369.800 372.267 374.733 377.200 379.667 382.133 384.600 387.067 389.533 392.000 394.467 396.933 399.400 401.867 404.333 406.800 409.267 411.733 414.200 416.667 419.133 421.600 424.067 426.533 429.000 431.467 433.933 436.400 438.867 441.333 443.800 446.267 448.733 451.200 453.667 456.133 458.600 461.067 463.533 466.000 468.467 470.933 473.400 475.867 478.333 480.800 483.267 485.733 488.200 490.667 493.133 495.600 498.067 500.533 503.000 505.467 507.933 510.400 512.867 515.333 517.800 520.267 522.733 525.200 527.667 530.133 532.600 535.067 537.533 540.000 555.000 570.000 590.000 615.000 640.000 670.456
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 72 0 0 75 72 0 66 0 75 75 0 75 72 75 75 69 72 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 51 48 48 45 45 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 2.734375 0.390625 -0.390625 -1.171875 0.390625 1.953125 -2.734375 -2.734375 -2.734375 -1.953125 2.734375 -0.390625 1.171875 1.953125 1.171875 -1.171875 -1.171875 0.390625 1.171875 0.390625 0.390625 1.171875 -2.734375 -1.171875 1.953125 2.734375 0.390625 2.734375 0.390625 1.171875 -1.953125 -1.171875 -1.171875 -1.171875 2.734375 -1.953125 0.390625 -1.953125 0.390625 1.953125 -1.953125 -1.171875 1.171875 1.953125 1.171875 1.171875 -2.734375 -2.734375 1.953125 -2.734375 2.734375 2.734375 -1.171875 0.390625 -1.953125 -2.734375 0.390625 -0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.6 1.65 1.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
89.221 89.541 89.880
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 66 69
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625
</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" >
89.852 90.0 95.0 100.0 105.0 110.0 114.774 115.0 119.549 120.0 124.323 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 393.105 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.213 1.144 1.481 1.655 1.71 1.631 1.631 1.631 1.638 1.71 1.727 1.854 1.988 2.127 2.274 2.427 2.588 2.756 2.93 3.11 3.296 3.487 3.681 3.879 4.08 4.283 4.487 4.693 4.9 5.107 5.315 5.523 5.731 5.939 6.147 6.356 6.564 6.772 6.98 7.189 7.397 7.605 7.812 8.02 8.227 8.434 8.64 8.845 9.049 9.252 9.452 9.65 9.845 10.036 10.221 10.399 10.569 10.728 10.873 11.003 11.113 11.2 11.261 11.294 11.3 11.299 11.291 11.274 11.248 11.214 11.172 11.123 11.067 11.004 10.935 10.861 10.781 10.695 10.605 10.511 10.413 10.311 10.205 10.097 9.985 9.872 9.755 9.637 9.517 9.396 9.273 9.149 9.024 8.899 8.773 8.646 8.519 8.392 8.266 8.139 8.013 7.887 7.761 7.636 7.512 7.389 7.266 7.145 7.024 6.905 6.786 6.669 6.553 6.438 6.325 6.212 6.101 5.992 5.884 5.777 5.672 5.568 5.466 5.365 5.265 5.167 5.071 4.975 4.882 4.79 4.699 4.61 4.522 4.436 4.351 4.267 4.185 4.104 4.025 3.947 3.87 3.795 3.721 3.648 3.577 3.507 3.438 3.371 3.304 3.239 3.175 3.113 3.051 2.991 2.932 2.873 2.816 2.76 2.705 2.652 2.599 2.547 2.496 2.446 2.397 2.349 2.302 2.256 2.211 2.167 2.123 2.08 2.039 1.998 1.958 1.918 1.88 1.842 1.805 1.768 1.733 1.698 1.663 1.63 1.597 1.565 1.533

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.71" PeakHeight="110.0" Num="3" Error="0.0">
-28.571 10.458 -2.035
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.71" EndFrequency="11.3" PeakHeight="393.105" Num="5" zHalfNm="289.289" Error="2.018">
-250.459 -32.232 20.206 -7.782 1.485
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.323" Depth="0.079"/>
<TopsideChapman PeakHeight="393.105" PeakDensity="1584243.1" PeakScaleHeight="76.041" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
