<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-07 -038 22:00:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: 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" >
2026.02.07 (038) 22:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603802072200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.345" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.460" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="390.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="390.000" 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="9.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="610.725" 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="0.415" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="479.420" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="411.983" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.909" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="101.508" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="22.994" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="50.140" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="113.810" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.310" 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" >
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 9.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
390.000 390.000 390.000 390.000 390.000 390.000 390.000 395.000 397.500 400.000 405.000 405.000 405.000 400.000 402.500 405.000 405.000 406.667 408.333 410.000 405.000 407.143 409.286 411.429 413.571 415.714 417.857 420.000 420.000 420.000 420.000 420.000 422.500 425.000 427.500 430.000 430.000 431.667 433.333 435.000 436.667 438.333 440.000 441.667 443.333 445.000 445.000 446.667 448.333 450.000 450.000 445.000 445.000 447.500 450.000 455.000 455.000 460.000 460.000 460.000 462.500 465.000 465.000 465.000 465.000 465.000 470.000 470.000 470.000 472.500 475.000 480.000 480.000 485.000 485.000 490.000 490.000 490.000 490.000 490.000 493.333 496.667 500.000 500.000 500.000 505.000 510.000 510.000 510.000 510.000 515.000 515.000 517.500 520.000 525.000 525.000 530.000 530.000 530.000 530.000 540.000 543.333 546.667 550.000 553.333 556.667 560.000 565.000 565.000 565.000 565.000 565.000 570.000 570.000 570.000 575.000 575.000 580.000 585.000 585.000 585.000 590.000 590.000 590.000 595.000 600.000 600.000 604.622 610.725 619.154 631.554
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 75 0 72 75 0 60 72 0 78 66 66 0 0 0 63 0 0 0 69 51 0 0 0 0 0 0 63 63 0 57 60 0 69 0 69 66 0 0 0 0 0 0 60 0 51 54 0 0 60 63 66 0 0 60 60 63 60 60 66 57 63 60 66 0 72 75 69 69 0 75 75 72 72 72 69 72 72 69 72 0 0 75 75 72 0 69 72 78 72 72 75 0 75 69 72 66 66 69 75 72 69 69 72 63 75 66 63 69 66 63 72 72 72 69 66 66 63 60 66 60 60 69 66 66 66 60 57 54 54 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 0.390625 -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 -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 -1.953125 -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 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375
</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" >
92.471 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.099 140.0 145.0 150.0 155.0 160.0 165.0 168.199 170.0 175.0 180.0 185.0 190.0 195.0 197.298 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 479.42 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.274 0.359 0.402 0.415 0.41 0.396 0.37 0.331 0.273 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.25 0.287 0.324 0.361 0.398 0.415 0.463 0.537 0.604 0.671 0.738 0.807 0.879 0.954 1.032 1.114 1.2 1.29 1.384 1.483 1.587 1.695 1.808 1.926 2.048 2.175 2.307 2.444 2.585 2.731 2.882 3.037 3.197 3.361 3.53 3.704 3.882 4.065 4.252 4.444 4.64 4.841 5.047 5.257 5.472 5.691 5.915 6.144 6.377 6.613 6.854 7.097 7.342 7.589 7.834 8.076 8.311 8.533 8.735 8.909 9.043 9.126 9.15 9.15 9.139 9.112 9.069 9.013 8.943 8.861 8.768 8.665 8.554 8.435 8.308 8.176 8.039 7.897 7.751 7.602 7.451 7.298 7.143 6.988 6.832 6.676 6.521 6.366 6.213 6.06 5.909 5.76 5.612 5.467 5.324 5.183 5.044 4.908 4.775 4.644 4.516 4.391 4.268 4.148 4.031 3.916 3.804 3.695 3.589 3.485 3.384 3.285 3.189 3.096 3.005 2.916 2.83 2.746 2.665 2.585 2.508 2.434 2.361 2.29 2.221 2.155 2.09 2.027 1.966 1.907 1.849 1.793 1.739 1.686 1.635 1.585 1.537 1.491 1.445 1.401 1.359 1.317 1.277 1.238 1.201 1.164 1.128 1.094 1.061 1.028 0.997 0.966 0.937 0.908 0.88 0.853 0.827 0.802 0.778 0.754 0.731 0.708 0.687 0.666 0.645 0.625 0.606 0.588

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.415" PeakHeight="110.0" Num="3" Error="0.0">
-20.598 3.315 -0.246
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.415" EndFrequency="9.15" PeakHeight="479.42" Num="5" zHalfNm="411.983" Error="4.922">
-247.701 -59.21 28.645 -6.606 2.75
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.298" Depth="0.215"/>
<TopsideChapman PeakHeight="479.42" PeakDensity="1038740.7" PeakScaleHeight="50.14" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
